JP4651563B2 - Manufacturing method of semiconductor device - Google Patents

Manufacturing method of semiconductor device Download PDF

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JP4651563B2
JP4651563B2 JP2006076643A JP2006076643A JP4651563B2 JP 4651563 B2 JP4651563 B2 JP 4651563B2 JP 2006076643 A JP2006076643 A JP 2006076643A JP 2006076643 A JP2006076643 A JP 2006076643A JP 4651563 B2 JP4651563 B2 JP 4651563B2
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semiconductor device
lead
manufacturing
carrier tape
semiconductor
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JP2007258211A5 (en
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誠 中本
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Renesas Electronics Corp
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/26Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/31Structure, shape, material or disposition of the layer connectors after the connecting process
    • H01L2224/32Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
    • H01L2224/321Disposition
    • H01L2224/32151Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/32221Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/32245Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/44Structure, shape, material or disposition of the wire connectors prior to the connecting process
    • H01L2224/45Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
    • H01L2224/45001Core members of the connector
    • H01L2224/45099Material
    • H01L2224/451Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
    • H01L2224/45138Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
    • H01L2224/45144Gold (Au) as principal constituent
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805Shape
    • H01L2224/4809Loop shape
    • H01L2224/48091Arched
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481Disposition
    • H01L2224/48151Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/484Connecting portions
    • H01L2224/48463Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
    • H01L2224/48465Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/73Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
    • H01L2224/732Location after the connecting process
    • H01L2224/73251Location after the connecting process on different surfaces
    • H01L2224/73265Layer and wire connectors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/12Passive devices, e.g. 2 terminal devices
    • H01L2924/1203Rectifying Diode
    • H01L2924/12032Schottky diode
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10Details of semiconductor or other solid state devices to be connected
    • H01L2924/11Device type
    • H01L2924/13Discrete devices, e.g. 3 terminal devices
    • H01L2924/1301Thyristor

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Description

本発明は、半導体装置の製造技術および半導体装置に関し、特に、半導体チップをリードフレームのダイパッド部上に搭載して樹脂封止した後、リードを切断して1個1個の半導体装置に個片化し、これをキャリアテープに収納して外観検査するまでの半導体装置の製造に適用して有効な技術に関するものである。   The present invention relates to a semiconductor device manufacturing technique and a semiconductor device, and in particular, after a semiconductor chip is mounted on a die pad portion of a lead frame and sealed with a resin, the leads are cut and separated into individual semiconductor devices. The present invention relates to a technique that is effective when applied to the manufacture of a semiconductor device until it is housed in a carrier tape and subjected to appearance inspection.

例えば被検査物の検査面に対して略垂直に配置される筒状拡散部と、筒状拡散部の筒外に配置され筒状拡散部に光を照射する照射手段であるリング状光源とを備えており、リング状光源から照射する光を筒状拡散部を介して拡散させ、その拡散光を筒状拡散部の筒内から被検査物へ当てて反射光を得るようにした外観検査用照明装置が特開平8−61928号公報(特許文献1参照)に開示されている。
特開平8−61928号公報(段落[0015]〜[0018]、図1)
For example, a cylindrical diffuser disposed substantially perpendicular to the inspection surface of the object to be inspected, and a ring-shaped light source that is an irradiation unit that is disposed outside the cylindrical diffuser and emits light to the cylindrical diffuser It is equipped for the purpose of visual inspection by diffusing the light emitted from the ring-shaped light source through the cylindrical diffusion part, and applying the diffused light from the inside of the cylindrical diffusion part to the object to be inspected to obtain reflected light. An illumination device is disclosed in Japanese Patent Laid-Open No. 8-61928 (see Patent Document 1).
JP-A-8-61928 (paragraphs [0015] to [0018], FIG. 1)

リードフレームのリードの切断には、一般に金型の切断パンチが用いられる。切断パンチの先端のリードに接する面(以下、接触面と記す)はほぼ平坦であり、この接触面にはリードフレームの表面を覆うメッキ層が剥がれて付着するのを防止するための鏡面仕上げ処理が施されている。さらに鏡面仕上げされた面にはDLC(Diamond Like Coating)処理によって10μm以下の厚さのダイアモンドと同じ硬度の被膜が形成されている。従って、鏡面仕上げ処理およびDLC処理が施された切断パンチの先端の接触面がリードの一部分に接し、切断パンチに力が加わることによってリードは切断される。   A die cutting punch is generally used for cutting the leads of the lead frame. The surface of the cutting punch that contacts the lead (hereinafter referred to as the contact surface) is almost flat, and the contact surface is mirror-finished to prevent the plating layer covering the surface of the lead frame from being peeled off and adhered. Is given. Further, a film having the same hardness as diamond having a thickness of 10 μm or less is formed on the mirror-finished surface by DLC (Diamond Like Coating) treatment. Accordingly, the contact surface at the tip of the cutting punch that has been subjected to the mirror finishing process and the DLC process is in contact with a part of the lead, and the lead is cut by applying a force to the cutting punch.

さらに、上記切断パンチを用いてリードフレームの本体から切り離された1個1個の半導体装置はキャリアテープに収納され、外観検査装置を用いて1個1個の半導体装置の外観検査が行われる。しかしながら、この外観検査においては以下に説明する種々の技術的課題が存在する。   Further, each semiconductor device separated from the main body of the lead frame using the cutting punch is housed in a carrier tape, and an appearance inspection of each semiconductor device is performed using an appearance inspection device. However, there are various technical problems described below in this appearance inspection.

半導体装置の外観検査では、キャリアテープに収納した半導体装置をCCD(Charge Coupled Devices)カメラにより撮像する。ところが、切断パンチの先端の接触面が接したリードの一部分が外観検査装置の撮像画像に黒く映り、背景の色(キャリアテープの色である黒)と判別できないためにリード形状が正しく認識できないという問題が生じた。   In the appearance inspection of a semiconductor device, the semiconductor device housed in a carrier tape is imaged by a CCD (Charge Coupled Devices) camera. However, a part of the lead that is in contact with the contact surface at the tip of the cutting punch appears black in the image picked up by the appearance inspection device and cannot be distinguished from the background color (black, which is the color of the carrier tape). There was a problem.

本発明の目的は、キャリアテープに収納された半導体装置の外観検査において、撮像画像における誤認識を低減することのできる技術を提供することにある。   An object of the present invention is to provide a technique capable of reducing erroneous recognition in a captured image in an appearance inspection of a semiconductor device housed in a carrier tape.

本発明の前記ならびにその他の目的と新規な特徴は、本明細書の記述および添付図面から明らかになるであろう。   The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

本願において開示される発明のうち、代表的なものの概要を簡単に説明すれば、次のとおりである。   Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

本発明の一つの実施の形態における半導体装置の製造方法は、以下の工程を含むことを特徴とする:(a)本体部と、表面、前記表面とは反対側の裏面、および前記表面及び前記裏面のそれぞれに形成されたメッキ層を有し、前記本体部と一体に形成され、かつ、半導体チップを封止する封止体から露出するリードと、を備えたリードフレームを準備する工程(b)前記(a)工程の後、前記リードの前記表面に形成された前記メッキ層における第1部分に切断パンチの接触面接触させ前記本体部から前記リードを分離し、前記リードフレームの前記本体部から切り離された半導体装置を取得する工程;(c)前記(b)工程の後、前記切り離された半導体装置をカメラで撮像し、取得した画像を用いて前記切り離された半導体装置の外観を検査する工程;ここで、前記(b)工程で使用する前記切断パンチの前記接触面には、凹凸が形成されており、前記(b)工程後の前記第1部分の粗さ前記リードの前記表面に形成された前記メッキ層における、前記切断パンチの前記接触面が接しない第2部分の粗さよりも大きく、前記第1部分は、前記第2部分よりも前記封止体から遠い位置であり、前記(c)工程では、前記リードの前記表面に光を照射する。 A method of manufacturing a semiconductor device according to an embodiment of the present invention includes the following steps: (a) a main body, a surface, a back surface opposite to the surface, and the surface and the surface step having a plating layer formed on each of the back side, said formed in the body portion integrally, and preparing a lead frame and a lead to expose the semi-conductor chip from the sealing member for sealing; (b) after step (a), the contacting of the contact surface of the disconnect punch to the first portion in the plating layer formed on the surface of the lead to separate the lead from the body portion, the lead A step of obtaining a semiconductor device separated from the main body of the frame ; (c) after the step (b), the separated semiconductor device is imaged with a camera, and the separated semiconductor is obtained using the obtained image. apparatus Step inspecting appearance; wherein said (b) to the contact surfaces of the cutting punch to be used in the process, the irregularities are formed, the (b) roughness of the first portion after step, In the plated layer formed on the surface of the lead, the roughness of the second portion where the contact surface of the cutting punch does not contact is larger than the second portion , and the first portion is larger than the second portion. In the step (c), the surface of the lead is irradiated with light.

本発明の一つの実施の形態における半導体装置は、リードの表面を覆うメッキ層の一部分の粗さと、リードの表面を覆うメッキ層の他の部分の粗さとが互いに異なるThe semiconductor device in one embodiment of the present invention, the roughness of a portion of the plating layer covering the surface of the lead, roughness and are different from one another in other parts of the plating layer covering the surface of the lead.

本願において開示される発明のうち、代表的なものによって得られる効果を簡単に説明すれば以下のとおりである。   Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

キャリアテープに収納された半導体装置の外観検査において、撮像画像における誤認識を低減することができる。   In the appearance inspection of the semiconductor device stored in the carrier tape, it is possible to reduce erroneous recognition in the captured image.

本実施の形態においては、要素の数等(個数、数値、量、範囲等を含む)に言及する場合、特に明示した場合および原理的に明らかに特定の数に限定される場合等を除き、その特定の数に限定されるものではなく、特定の数以上でも以下でも良い。さらに、本実施の形態において、その構成要素(要素ステップ等も含む)は、特に明示した場合および原理的に明らかに必須であると考えられる場合等を除き、必ずしも必須のものではないことは言うまでもない。同様に、本実施の形態において、構成要素等の形状、位置関係等に言及するときは、特に明示した場合および原理的に明らかにそうでないと考えられる場合等を除き、実質的にその形状等に近似または類似するもの等を含むものとする。このことは、上記数値および範囲についても同様である。   In the present embodiment, when referring to the number of elements and the like (including the number, numerical value, quantity, range, etc.), unless otherwise specified, or in principle limited to a specific number in principle, It is not limited to the specific number, and it may be more or less than the specific number. Further, in the present embodiment, the constituent elements (including element steps and the like) are not necessarily essential unless particularly specified and apparently essential in principle. Yes. Similarly, in this embodiment, when referring to the shape, positional relationship, etc. of the component, etc., the shape, etc., substantially, unless otherwise specified or otherwise considered in principle. It shall include those that are approximate or similar to. The same applies to the above numerical values and ranges.

また、本実施の形態において、リードフレーム、リードまたはダイパッド部の表面と言うときは、半導体チップを搭載する側の面を指すものとする。   In the present embodiment, the surface of the lead frame, lead, or die pad portion refers to the surface on the side where the semiconductor chip is mounted.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。なお、実施の形態を説明するための全図において、同一の部材には原則として同一の符号を付し、その繰り返しの説明は省略する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

まず、本発明の実施の形態による半導体装置の製造方法がより明確となると思われるため、本発明者によって見いだされた外観検査において生ずる撮像画像の誤認識の原因について簡単に説明する。   First, since it seems that the manufacturing method of the semiconductor device by embodiment of this invention becomes clearer, the cause of the misrecognition of the captured image which arises in the external appearance test | inspection discovered by this inventor is demonstrated easily.

外観検査装置に備わるリング状照明の径は、例えば25〜30mmであり、一般に半導体装置の長さよりも大きいことから、半導体装置に入射する光は半導体装置の表面の法線方向に対して一定の角度を有している。また、半導体チップを保護する封止樹脂の表面にレーザによってマークを彫る場合があるが、そのマークの溝の底部は湾曲することから、半導体装置の表面の法線方向から光りを入射させると、乱反射によってマークの真上に置かれたCCDカメラに入る光の量が少なくなりマークが見えにくくなる。そのため、照明からの光を半導体装置の表面の法線方向に対して一定の角度を持たせて照射している。   The diameter of the ring-shaped illumination provided in the appearance inspection apparatus is, for example, 25 to 30 mm, and is generally larger than the length of the semiconductor device. Therefore, the light incident on the semiconductor device is constant with respect to the normal direction of the surface of the semiconductor device. Have an angle. In addition, there is a case where a mark is carved by a laser on the surface of the sealing resin that protects the semiconductor chip, but since the bottom of the groove of the mark is curved, when light is incident from the normal direction of the surface of the semiconductor device, The amount of light entering the CCD camera placed directly above the mark is reduced due to diffuse reflection, and the mark becomes difficult to see. Therefore, the light from the illumination is irradiated with a certain angle with respect to the normal direction of the surface of the semiconductor device.

通常、メッキ処理が施されたリードの表面は微細な凹凸のある粗地状態である。半導体装置の外観検査において、この状態のリードを備える半導体装置に光を照射すると、照射された光がリードを覆うメッキ層の表面で乱反射するので、乱反射した比較的多量の光を半導体装置の中心のほぼ真上に置かれたCCDカメラで得ることができる。これにより、リードを覆うメッキ層は白またはキャリアテープの色と区別できる白に近い色彩となって外観検査装置の撮像画像に映し出される。従って、リードを覆うメッキ層の色はキャリアテープの色である黒と明らかに区別することができて、半導体装置に備わるリードの形状を外観検査装置の撮像画像によって正確に認識することができる。   Usually, the surface of the lead subjected to the plating process is in a rough ground state with fine irregularities. In the appearance inspection of a semiconductor device, when light is irradiated onto a semiconductor device having a lead in this state, the irradiated light is irregularly reflected on the surface of the plating layer covering the lead, so that a relatively large amount of irregularly reflected light is centered on the semiconductor device. Can be obtained with a CCD camera placed almost directly above. As a result, the plated layer covering the lead is displayed in a captured image of the appearance inspection apparatus in a color close to white that can be distinguished from white or the color of the carrier tape. Therefore, the color of the plating layer covering the lead can be clearly distinguished from the color of the carrier tape, and the shape of the lead provided in the semiconductor device can be accurately recognized by the captured image of the appearance inspection device.

しかし、リードを切断する際、鏡面仕上げおよびDLC処理が施された切断パンチの先端の接触面でリードを押さえると、その接触面と接したリードを覆うメッキ層の一部分の表面は鏡面状態となる。このため、半導体装置に照射された光のうち鏡面状態のリードを覆うメッキ層の一部分の表面で反射する光は全反射し、半導体装置の中心のほぼ真上に置かれたCCDカメラに入る光の量がリードを覆うメッキ層の表面が粗地状態の他の部分と比べて少なくなる。これにより、リードの一部分が黒またはキャリアテープの色と区別できない黒に近い色彩となって外観検査装置の撮像画像に映し出される。従って、鏡面状態のリードの一部分の形状はキャリアテープと明確に区別することが難しくなり、半導体装置に備わるリードの形状を外観検査装置の撮像画像によって正確に認識することができなくなる。   However, when the lead is cut, if the lead is pressed by the contact surface at the tip of the cutting punch that has undergone mirror finishing and DLC treatment, the surface of the part of the plating layer that covers the lead in contact with the contact surface is in a mirror state. . For this reason, of the light irradiated to the semiconductor device, the light reflected by the surface of a part of the plating layer covering the specular lead is totally reflected and enters the CCD camera placed almost directly above the center of the semiconductor device. Therefore, the surface of the plating layer covering the lead is smaller than the other portions in the rough ground state. As a result, a part of the lead becomes black or a color close to black that cannot be distinguished from the color of the carrier tape, and is displayed on the captured image of the appearance inspection apparatus. Accordingly, it becomes difficult to clearly distinguish the shape of a part of the lead in the mirror surface state from the carrier tape, and the shape of the lead provided in the semiconductor device cannot be accurately recognized by the captured image of the appearance inspection device.

なお、キャリアテープの素材は導電性ポリカーボネイトであり、炭素を含んでいるため、その色は黒となる。導電性を有する炭素をキャリアテープに混在させることにより、半導体装置の静電破壊を防止することができるので、キャリアテープに炭素を含む素材を用いることが望ましい。   The carrier tape is made of conductive polycarbonate and contains carbon, so the color is black. By mixing conductive carbon in the carrier tape, electrostatic breakdown of the semiconductor device can be prevented. Therefore, it is desirable to use a material containing carbon for the carrier tape.

次に、本発明の一実施の形態による半導体装置の製造方法を図1〜図12を用いて説明する。図1は半導体装置の製造方法において、その工程フローの一例を示すフロー図、図2はリードフレームの表面図、図3はリードフレームの単位フレームに搭載された半導体装置の要部断面図、図4は切断装置およびその動作を説明する概略図、図5はリード切断された半導体装置のリードの拡大断面図、図6はリード切断された半導体装置のバリが生じたリードの拡大断面図、図7はリード切断された半導体装置の斜視図、図8はリード切断された半導体装置の上面図、図9は半導体装置を収納したキャリアテープの上面図、図10は自動外観検査装置およびその動作を説明する概略図、図11は光源から照射された光およびリードの表面で反射した光の進行を模式的に説明する半導体装置のリードの拡大断面図、図12は出荷時における半導体装置を搭載したキャリアテープの概略図であり、(a)は側面図、(b)は正面図である。   Next, a method for manufacturing a semiconductor device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a flowchart showing an example of a process flow in a method of manufacturing a semiconductor device, FIG. 2 is a surface view of a lead frame, FIG. 3 is a cross-sectional view of a main part of a semiconductor device mounted on a unit frame of the lead frame, and FIG. 4 is a schematic diagram for explaining a cutting device and its operation, FIG. 5 is an enlarged cross-sectional view of a lead of a semiconductor device whose lead is cut, and FIG. 6 is an enlarged cross-sectional view of a lead where a burr of the semiconductor device is cut. 7 is a perspective view of the semiconductor device with the lead cut, FIG. 8 is a top view of the semiconductor device with the lead cut, FIG. 9 is a top view of the carrier tape containing the semiconductor device, and FIG. 10 is an automatic visual inspection device and its operation. FIG. 11 is a schematic diagram for explaining, FIG. 11 is an enlarged cross-sectional view of a lead of a semiconductor device for schematically explaining the progress of light irradiated from a light source and light reflected from the surface of the lead, and FIG. It is a schematic view of a carrier tape equipped with the body apparatus, (a) shows the side view, (b) is a front view.

まず、図2に示すリードフレーム1を用意する。リードフレーム1は、例えば銅からなり、長手方向(x軸方向)を列とし、これに直交する方向(y軸方向)を行とすると、半導体装置が1つ形成される単位フレーム2が複数行2列に配置された構成となっている。各単位フレーム2は半導体チップが搭載されるダイパッド部(タブ、チップ搭載部)3を含んでおり、ダイパッド部3はリードフレーム1の本体とリード4aによって繋がっている。さらに各単位フレーム2はダイパッド部3と対向するように設けられ、半導体チップの表面電極と接続されるリード4bを含んでいる。また、複数の単位フレーム2のうち、隣り合う単位フレーム2の間にはタイバー4cを含んでいる。このタイバー4cが設けられていることにより、後の切断工程において、半導体装置9がリードフレーム1から切り離されても、リードフレーム1が複数個に分離することはない。また、各単位フレーム2の周辺には複数の孔5が設けられているが、これはリードフレーム1の位置決めのため、あるいは樹脂封止に伴うリードフレーム1の歪みを緩和するためのものであり、またリードフレーム1を移動する際の送り機構としても用いられる。   First, the lead frame 1 shown in FIG. 2 is prepared. The lead frame 1 is made of, for example, copper, and a unit frame 2 in which one semiconductor device is formed is formed in a plurality of rows when a longitudinal direction (x-axis direction) is a column and a direction perpendicular to the row (y-axis direction) is a row. The configuration is arranged in two rows. Each unit frame 2 includes a die pad portion (tab, chip mounting portion) 3 on which a semiconductor chip is mounted. The die pad portion 3 is connected to the main body of the lead frame 1 by leads 4a. Further, each unit frame 2 is provided so as to face the die pad portion 3 and includes a lead 4b connected to the surface electrode of the semiconductor chip. A tie bar 4 c is included between adjacent unit frames 2 among the plurality of unit frames 2. By providing the tie bar 4c, even if the semiconductor device 9 is separated from the lead frame 1 in a subsequent cutting step, the lead frame 1 is not separated into a plurality of pieces. A plurality of holes 5 are provided around each unit frame 2 for positioning the lead frame 1 or for reducing distortion of the lead frame 1 due to resin sealing. It is also used as a feed mechanism when moving the lead frame 1.

次に、図3に示すように、各単位フレーム2のダイパッド部3の表面上に、半導体チップ6の裏面に形成された裏面電極を、例えば金−シリコン共晶または銀ペーストを用いて接合する。続いて、半導体チップ6の表面に形成された表面電極とリード4bとをボンディングワイヤ7、例えば金線を用いて接続する(図1の工程100)。半導体チップ6にはダイオード、例えばPIN(Positive Intrinsic Negative)ダイオード、pnダイオード(例えばスイッチングダイオードまたはツェナーダイオード)、あるいはショットキ・バリアダイオード等が形成されており、半導体チップ6の表面に形成された表面電極と、半導体チップ6の裏面に形成された裏面電極とから2つの端子を取り出すことができる。   Next, as shown in FIG. 3, the back electrode formed on the back surface of the semiconductor chip 6 is bonded onto the surface of the die pad portion 3 of each unit frame 2 using, for example, gold-silicon eutectic or silver paste. . Subsequently, the surface electrode formed on the surface of the semiconductor chip 6 and the lead 4b are connected using a bonding wire 7, for example, a gold wire (step 100 in FIG. 1). The semiconductor chip 6 is formed with a diode, for example, a PIN (Positive Intrinsic Negative) diode, a pn diode (for example, a switching diode or a Zener diode), or a Schottky barrier diode. A surface electrode formed on the surface of the semiconductor chip 6 Then, two terminals can be taken out from the back electrode formed on the back surface of the semiconductor chip 6.

次に、ダイパッド部3の裏面およびリード4a,4bの裏面を露出させて、半導体チップ6およびボンディングワイヤ7を樹脂8、例えばエポキシ系樹脂により封止して保護する。これにより、リードフレーム1の各単位フレーム2に半導体チップ6が搭載された半導体装置9が形成される(図1の工程101)。   Next, the back surface of the die pad portion 3 and the back surfaces of the leads 4a and 4b are exposed, and the semiconductor chip 6 and the bonding wire 7 are sealed and protected by a resin 8, for example, an epoxy resin. Thereby, the semiconductor device 9 in which the semiconductor chip 6 is mounted on each unit frame 2 of the lead frame 1 is formed (step 101 in FIG. 1).

その後、リードフレーム1に半導体装置9が形成された状態でメッキ処理することにより、樹脂封止されていないリードフレーム1の表面および裏面に厚さ10μm以下、例えば7μmの錫−銅系合金または、錫−鉛系合金からなるメッキ層を形成する。さらに、樹脂8の上面(リード4a,4bと接する面と反対の面)にレーザにより製品識別用のマークが彫られる(図1の工程102)。   Thereafter, by plating with the semiconductor device 9 formed on the lead frame 1, a tin-copper alloy having a thickness of 10 μm or less, for example, 7 μm, on the front and back surfaces of the lead frame 1 that is not resin-sealed, or A plating layer made of a tin-lead alloy is formed. Further, a product identification mark is engraved on the upper surface of the resin 8 (the surface opposite to the surface in contact with the leads 4a and 4b) by a laser (step 102 in FIG. 1).

次に、図4に示すように、切断装置10を用いてメッキ処理されたリード4a,4bを切断し、リードフレーム1の本体から各半導体装置9を切り離す(図1の工程103)。この際、切断装置10に備わる切断パンチ11は、樹脂8の上面側からリードフレーム1に打ち下ろされる。従って、後の半導体装置9の外観検査において撮像されるメッキ処理されたリード4a,4bの表面に切断パンチ11の先端が接することになる。切断パンチ11の先端の幅(図4のL1)は、例えば0.06mmであり、切り離された半導体装置9の樹脂8から露出するリード4の長さ(図4のL2)は、例えば0.1mmである。   Next, as shown in FIG. 4, the leads 4a and 4b plated using the cutting device 10 are cut, and each semiconductor device 9 is separated from the main body of the lead frame 1 (step 103 in FIG. 1). At this time, the cutting punch 11 provided in the cutting device 10 is dropped onto the lead frame 1 from the upper surface side of the resin 8. Therefore, the tip of the cutting punch 11 comes into contact with the surfaces of the plated leads 4a and 4b which are imaged in the subsequent appearance inspection of the semiconductor device 9. The width of the tip of the cutting punch 11 (L1 in FIG. 4) is, for example, 0.06 mm, and the length of the lead 4 exposed from the resin 8 of the cut semiconductor device 9 (L2 in FIG. 4) is, for example, 0. 1 mm.

リードフレーム1のメッキ処理されたリード4a,4bに接する切断パンチ11の接触面11aは、ほぼ平面形状(図4に挿入した拡大図(a))または一辺が僅かに湾曲したほぼ平面形状(図4に挿入した拡大図(b))を有しているが、接触面11aには微細な凹凸が形成されている。この微細な凹凸は、例えば粗さ♯200(単位面積当たりの凸部の数が200個程度)の砥石を押し当てて研磨することにより形成することができる。なお、砥石の粗さとしては、例えば♯100から♯500が適切な範囲と考えられる(他の条件によってはこの範囲に限定されないことはもとよりである)。また、量産に適した範囲としては♯200から♯400が考えられるが、さらに♯200を中心値とする周辺範囲が最も好適と考えられる。   The contact surface 11a of the cutting punch 11 in contact with the plated leads 4a and 4b of the lead frame 1 has a substantially planar shape (enlarged view (a) inserted in FIG. 4) or a substantially planar shape with one side slightly curved (FIG. 4 has an enlarged view (b)), and fine irregularities are formed on the contact surface 11a. The fine irregularities can be formed, for example, by pressing and grinding a grindstone having a roughness # 200 (the number of convex portions per unit area is about 200). As the roughness of the grindstone, for example, # 100 to # 500 is considered to be an appropriate range (it is not limited to this range depending on other conditions). Further, as a range suitable for mass production, # 200 to # 400 are conceivable, but a peripheral range centering on # 200 is considered most suitable.

図5に、上記接触面11aを有する切断パンチ11を用いてリードフレーム1の本体から切り離された半導体装置9のリード4の拡大図を示す。リード4の表面にはメッキ層13が形成されており、通常、メッキ層13の表面は微細な凹凸のある粗地状態である(図5、6および11の拡大図では直線で記載)。さらに、リード4a,4bの切断時に微細な凹凸を付けた切断パンチ11の接触面11aが接することから、切断パンチ11の接触面11aが接したリード4を覆うメッキ層13の表面は、切断パンチ11の接触面11aが接しないリード4を覆うメッキ層13の表面と同等あるいはそれ以上に粗い粗地状態となる。従って、後の半導体装置9の外観検査において、半導体装置9に光を照射した場合、その光はリード4を覆うメッキ層13の表面の粗地によって乱反射させることができる。   FIG. 5 shows an enlarged view of the lead 4 of the semiconductor device 9 cut from the main body of the lead frame 1 using the cutting punch 11 having the contact surface 11a. A plated layer 13 is formed on the surface of the lead 4, and the surface of the plated layer 13 is usually in a rough ground state with fine irregularities (indicated by straight lines in the enlarged views of FIGS. 5, 6 and 11). Further, since the contact surface 11a of the cutting punch 11 with fine irregularities contacts when the leads 4a and 4b are cut, the surface of the plating layer 13 covering the lead 4 with which the contact surface 11a of the cutting punch 11 contacts is the cutting punch. The surface of the plated layer 13 covering the lead 4 that is not in contact with the contact surface 11a of 11 is in a rough ground state equivalent to or larger than the surface of the plated layer 13. Therefore, in the subsequent appearance inspection of the semiconductor device 9, when the semiconductor device 9 is irradiated with light, the light can be irregularly reflected by the rough ground on the surface of the plating layer 13 covering the leads 4.

なお、切断装置10に備わる切断パンチ11を、樹脂8の下面(リード4a,4bと接する面)側からリードフレーム1に打ち上げることにより、リード4a,4bを切断し、リードフレーム11の本体から各半導体装置9を切り離すことは可能である。この場合は、後の半導体装置9の外観検査において撮像されるメッキ処理されたリード4a,4bの表面に切断パンチ11の先端が接しないので、撮像画面には粗地状態のメッキ層13に覆われたリード4の形状が映し出されて、常にリード4の形状を撮像画像によって正確に認識することができる。しかしながら、切断パンチ11を樹脂8の下面側(リード4a,4bの裏面側)からリードフレーム1に打ち上げるこの手段では、打ち上げにより生じたメッキ層13またはリードフレーム1を構成する金属のバリ、所謂リードダレ(リードバリ)13aがリード4の裏面側に突出てしまう。その結果、半導体装置9を実装基板に実装する際にリード4が浮いた状態となり、実装不良が生ずることがある。従って、切断パンチ11は、樹脂8の上面側からリードフレーム1に打ち下ろす手段が好ましい。この場合も同様に、リードフレーム1の打ち下げによりリードダレ13aは生じるが、例えば図6に示すように、リード4の表面側に出るので実装時の不良原因とはならない。   A cutting punch 11 provided in the cutting device 10 is launched onto the lead frame 1 from the lower surface of the resin 8 (surface in contact with the leads 4a and 4b), thereby cutting the leads 4a and 4b. It is possible to separate the semiconductor device 9. In this case, since the tips of the cutting punches 11 do not contact the surfaces of the plated leads 4a and 4b to be imaged in the subsequent appearance inspection of the semiconductor device 9, the imaging screen is covered with the rough plating layer 13. The shape of the broken lead 4 is displayed, and the shape of the lead 4 can always be accurately recognized from the captured image. However, with this means for raising the cutting punch 11 from the lower surface side of the resin 8 (the back surface side of the leads 4a and 4b) to the lead frame 1, the plating layer 13 generated by the launch or the metal burrs constituting the lead frame 1, so-called lead sag (Lead burr) 13a protrudes to the back side of the lead 4. As a result, when the semiconductor device 9 is mounted on the mounting substrate, the lead 4 is in a floating state, and a mounting failure may occur. Therefore, it is preferable that the cutting punch 11 is a means for dropping onto the lead frame 1 from the upper surface side of the resin 8. In this case as well, the lead sag 13a is generated by dropping the lead frame 1, but it does not cause a defect during mounting because it comes out on the surface side of the lead 4 as shown in FIG. 6, for example.

前述した切断方法によりリードフレーム1の本体から切り離された半導体装置9の斜視図および上面図を図7および図8に示す。図中、符号4(13)はメッキ層13により覆われたリード4を示し、“BO”は樹脂8の上面にレーザを使用して彫られたマークの一例である。   7 and 8 are a perspective view and a top view of the semiconductor device 9 cut from the main body of the lead frame 1 by the cutting method described above. In the drawing, reference numeral 4 (13) denotes the lead 4 covered with the plating layer 13, and “BO” is an example of a mark carved on the upper surface of the resin 8 using a laser.

次に、半導体装置9を選別した後、図9に示すように、キャリアテープ14の窪み14aに半導体装置9を収納する(図1の工程104)。キャリアテープ14は、長手方向(x軸方向)を列とし、これに直交する方向(y軸方向)を行とすると、半導体装置が1つ収納される窪み14aが複数行1列に配置された構成となっている。   Next, after selecting the semiconductor device 9, as shown in FIG. 9, the semiconductor device 9 is stored in the recess 14a of the carrier tape 14 (step 104 in FIG. 1). The carrier tape 14 has a plurality of rows and one column of recesses 14a in which one semiconductor device is accommodated, where the longitudinal direction (x-axis direction) is a column and the direction perpendicular to the carrier tape 14 is a row (y-axis direction). It has a configuration.

次に、図10に示すように、外観検査装置15を用いてキャリアテープ14の窪み14aに収納された各半導体装置9の外観検査を行う(図1の工程105)。外観検査装置15は、半導体装置9へ光を照射するリング状光源16、半導体装置9から反射した光を取り込むCCDカメラ17、およびその他、図示は省略するが画像処理装置等を備えている。また、キャリアテープ14の窪み14aに収納された各半導体装置9の表面側にはカバーテープ18が貼られている。カバーテープ18を貼ることにより、キャリアテープ14の窪み14aに収納された半導体装置9が外部に飛び出ないように保持することができる。   Next, as shown in FIG. 10, the appearance inspection of each semiconductor device 9 accommodated in the recess 14a of the carrier tape 14 is performed using the appearance inspection device 15 (step 105 in FIG. 1). The appearance inspection device 15 includes a ring light source 16 that irradiates light to the semiconductor device 9, a CCD camera 17 that captures light reflected from the semiconductor device 9, and an image processing device (not shown). A cover tape 18 is attached to the front side of each semiconductor device 9 housed in the recess 14 a of the carrier tape 14. By sticking the cover tape 18, the semiconductor device 9 accommodated in the recess 14 a of the carrier tape 14 can be held so as not to jump out.

リード4の表面はメッキ層13で覆われていること、さらに切断パンチ11を使用してリードフレーム1から半導体装置9を切り離す際、微細な凹凸を付けた接触面11aをリード4a,4bを覆うメッキ層13に当てて押していることから、CCDカメラ17で撮像される半導体装置9のリード4の表面を覆うメッキ層13の表面は全て粗地状態となっている。これにより、図11に示すように、リング状光源16から照射された光R1がリード4を覆うメッキ層13の表面で乱反射してCCDカメラ17に到達する反射光R2の量が増える。その結果、リード4は白またはキャリアテープの黒と明らかに区別できる白に近い色彩となって撮像画像に映し出されて、リード4の形状を正しく認識することができる。   The surface of the lead 4 is covered with the plating layer 13, and when the semiconductor device 9 is separated from the lead frame 1 using the cutting punch 11, the contact surface 11a with fine irregularities is covered with the leads 4a and 4b. Since it is pressed against the plating layer 13, the surface of the plating layer 13 covering the surface of the lead 4 of the semiconductor device 9 imaged by the CCD camera 17 is in a rough state. As a result, as shown in FIG. 11, the amount of the reflected light R <b> 2 that reaches the CCD camera 17 is increased by irregularly reflecting the light R <b> 1 irradiated from the ring-shaped light source 16 on the surface of the plating layer 13 covering the leads 4. As a result, the lead 4 has a color close to white that can be clearly distinguished from white or black on the carrier tape, and is reflected in the captured image, so that the shape of the lead 4 can be recognized correctly.

次に、外観検査において外観不良と判断された半導体装置9を取り除いた後、図12に示すように、キャリアテープ14をリール19に巻き取り、防湿された袋にリード19を収容した状態で、出荷する(図1の工程106)。   Next, after removing the semiconductor device 9 determined to be defective in appearance inspection, the carrier tape 14 is wound around the reel 19 as shown in FIG. 12, and the leads 19 are accommodated in a moisture-proof bag. Ship (step 106 in FIG. 1).

なお、前述した実施の形態では、切断パンチ11の先端の接触面11aが接したリード4を覆うメッキ層13の表面を、切断パンチ11の先端の接触面11aが接しないリード4を覆うメッキ層13の表面と同等あるいはそれ以上に粗い粗地状態としており、この粗地状態が本発明を実施する最良の形態であると考えられるが、これに限定されるものではない。   In the above-described embodiment, the surface of the plating layer 13 covering the lead 4 in contact with the contact surface 11a at the tip of the cutting punch 11 is coated with the surface of the plating layer 13 covering the lead 4 not in contact with the contact surface 11a at the tip of the cutting punch 11. The rough ground state is rougher than or equal to the surface of 13 and this rough ground state is considered to be the best mode for carrying out the present invention, but is not limited thereto.

例えば切断パンチ11の先端の接触面11aが接したリード4を覆うメッキ層13の表面を、切断パンチ11の先端の接触面11aが接しないリード4を覆うメッキ層13の表面よりも粗くない粗地状態とすることも可能である。すなわち、このような場合であっても、切断パンチ11の先端の接触面11aが接したリード4を覆うメッキ層13の表面に、外観検査装置15で得られる撮像画面でリード4の形状と認識することができる、ある一定の粗さがあれば良い。   For example, the surface of the plating layer 13 that covers the lead 4 in contact with the contact surface 11a at the tip of the cutting punch 11 is rougher than the surface of the plating layer 13 that covers the lead 4 that does not contact the contact surface 11a at the tip of the cutting punch 11. It can also be in the ground state. That is, even in such a case, the shape of the lead 4 is recognized on the surface of the plating layer 13 covering the lead 4 with which the contact surface 11a at the tip of the cutting punch 11 is in contact with the imaging screen obtained by the appearance inspection device 15. There must be a certain roughness that can be achieved.

また、例えば半導体装置9の静電破壊を防止する目的で、現在は導電性を有する炭素をキャリアテープ14の材料に混在しており、このためキャリアテープ14の色は黒となる。しかし、炭素に代えて他の導電性を有する元素をキャリアテープの材料に混在する、炭素に加えて他の導電性を有する元素をキャリアテープの材料に混在する、あるいは静電耐圧の高い半導体装置の場合は、その材料に炭素を混在しないキャリアテープを用いることによって、キャリアテープを黒以外の色としてもよい。これにより、外観検査装置15で得られる撮像画像においてリード4の形状を表す色とキャリアテープの色とを区別して、リード4の形状を認識することも可能である。   For example, for the purpose of preventing electrostatic breakdown of the semiconductor device 9, carbon having conductivity is currently mixed in the material of the carrier tape 14, and thus the color of the carrier tape 14 is black. However, in place of carbon, other conductive elements are mixed in the carrier tape material, in addition to carbon, other conductive elements are mixed in the carrier tape material, or a semiconductor device having a high electrostatic withstand voltage. In this case, the carrier tape may be a color other than black by using a carrier tape that does not contain carbon in the material. Accordingly, it is possible to recognize the shape of the lead 4 by distinguishing the color representing the shape of the lead 4 from the color of the carrier tape in the captured image obtained by the appearance inspection device 15.

また、例えば半導体装置9がリードフレーム1から切断された後でも、リードフレーム1が互いに分離しないように保持しておくためのタイバー4cは、1つの単位フレーム2おきに配置されていなくてもよく、複数個の単位フレーム群おきに設けてもよい。   Further, for example, even after the semiconductor device 9 is cut from the lead frame 1, the tie bars 4c for holding the lead frames 1 so as not to be separated from each other need not be arranged every other unit frame 2. Alternatively, a plurality of unit frame groups may be provided.

このように、本実施の形態によれば、所定の光を照射して、その反射した光を取り込むことで得られる画像処理によって外観検査する場合、半導体装置のリードの形状とキャリアテープとの区別が明確にできるので、撮像画像におけるリードの形状の誤認識を低減することができる。   As described above, according to the present embodiment, when visual inspection is performed by image processing obtained by irradiating predetermined light and capturing the reflected light, the shape of the lead of the semiconductor device is distinguished from the carrier tape. Therefore, erroneous recognition of the lead shape in the captured image can be reduced.

以上、本発明者によってなされた発明を実施の形態に基づき具体的に説明したが、本発明は前記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能であることはいうまでもない。   As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

例えば、前記実施の形態では、ダイオード製品に適用した場合について説明したが、切断パンチを用いてリードフレームから切断され、その後、所定の光を照射して、その反射した光を取り込むことで得られる画像処理により外観検査が行われるダイオード製品以外の半導体装置にも適用することができる。   For example, in the above-described embodiment, the case where the present invention is applied to a diode product has been described. However, it is obtained by cutting from a lead frame using a cutting punch, and then irradiating predetermined light and capturing the reflected light. The present invention can also be applied to semiconductor devices other than diode products whose appearance is inspected by image processing.

本発明は、リードを有するディスクリート半導体装置(トランジスタ、ダイオード、コンデンサ、サイリスタなどの半導体装置)に利用することが可能である。   The present invention can be used for discrete semiconductor devices having leads (semiconductor devices such as transistors, diodes, capacitors, and thyristors).

本発明の一実施の形態による半導体装置の製造方法において、その工程フローの一例を示すフロー図である。FIG. 10 is a flowchart showing an example of a process flow in a method for manufacturing a semiconductor device according to an embodiment of the present invention. 本発明の一実施の形態によるリードフレームの表面図である。1 is a surface view of a lead frame according to an embodiment of the present invention. 本発明の一実施の形態によるリードフレームの単位フレームに搭載された半導体装置の要部断面図である。1 is a cross-sectional view of a main part of a semiconductor device mounted on a unit frame of a lead frame according to an embodiment of the present invention. 本発明の一実施の形態による切断装置およびその動作を説明する概略図である。It is the schematic explaining the cutting device by one embodiment of this invention, and its operation | movement. 本発明の一実施の形態によるリード切断された半導体装置のリードの拡大断面図である。It is an expanded sectional view of the lead of the semiconductor device by which the lead was cut by one embodiment of the present invention. 本発明の一実施の形態によるリード切断された半導体装置のバリが生じたリードの拡大断面図である。1 is an enlarged cross-sectional view of a lead in which burrs have occurred in a semiconductor device that has been lead-cut according to an embodiment of the present invention. 本発明の一実施の形態によるリード切断された半導体装置の斜視図である。1 is a perspective view of a semiconductor device having a lead cut according to an embodiment of the present invention; 本発明の一実施の形態によるリード切断された半導体装置の上面図である。It is a top view of the semiconductor device by which lead cutting was carried out by one embodiment of the present invention. 本発明の一実施の形態による半導体装置を収納したキャリアテープの上面図である。It is a top view of the carrier tape which accommodated the semiconductor device by one embodiment of this invention. 本発明の一実施の形態による自動外観検査装置およびその動作を説明する概略図である。It is the schematic explaining the automatic visual inspection apparatus by one embodiment of this invention, and its operation | movement. 本発明の一実施の形態によるリード切断された半導体装置のリードの拡大断面図である。It is an expanded sectional view of the lead of the semiconductor device by which the lead was cut by one embodiment of the present invention. (a)および(b)は、それぞれ本発明の一実施の形態による出荷時における半導体装置を搭載したキャリアテープの側面図および正面図である。(A) And (b) is the side view and front view of the carrier tape which respectively mounted the semiconductor device at the time of shipment by one embodiment of this invention.

符号の説明Explanation of symbols

1 リードフレーム
2 単位フレーム
3 ダイパッド部(タブ、チップ搭載部)
4,4a,4b リード
4c タイバー
5 孔
6 半導体チップ
7 ボンディングワイヤ
8 樹脂
9 半導体装置
10 切断装置
11 切断パンチ
11a 接触面
13 メッキ層
13a リードダレ(リードバリ)
14 キャリアテープ
14a 窪み
15 外観検査装置
16 リング状光源
17 CCDカメラ
18 カバーテープ
19 リール
R1,R2 光
1 Lead frame 2 Unit frame 3 Die pad part (tab, chip mounting part)
4, 4a, 4b Lead 4c Tie bar 5 Hole 6 Semiconductor chip 7 Bonding wire 8 Resin 9 Semiconductor device 10 Cutting device 11 Cutting punch 11a Contact surface 13 Plating layer 13a Lead sagging (lead burr)
14 Carrier tape 14a Dimple 15 Appearance inspection device 16 Ring light source 17 CCD camera 18 Cover tape 19 Reel R1, R2 Light

Claims (10)

以下の工程を含むことを特徴とする半導体装置の製造方法:
(a)本体部と、表面、前記表面とは反対側の裏面、および前記表面及び前記裏面のそれぞれに形成されたメッキ層を有し、前記本体部と一体に形成され、かつ、半導体チップを封止する封止体から露出するリードと、を備えたリードフレームを準備する工程;
(b)前記(a)工程の後、前記リードの前記表面に形成された前記メッキ層における第1部分に切断パンチの接触面接触させ、前記本体部から前記リードを分離し、前記リードフレームの前記本体部から切り離された半導体装置を取得する工程;
(c)前記(b)工程の後、前記切り離された半導体装置をカメラで撮像し、取得した画像を用いて前記切り離された半導体装置の外観を検査する工程;
ここで
前記(b)工程で使用する前記切断パンチの前記接触面には、凹凸が形成されており、
記(b)工程後の前記第1部分の粗さ前記リードの前記表面に形成された前記メッキ層における、前記切断パンチの前記接触面が接しない第2部分の粗さよりも大きく、
前記第1部分は、前記第2部分よりも前記封止体から遠い位置であり、
前記(c)工程では、前記リードの前記表面に光を照射する。
A method for manufacturing a semiconductor device comprising the following steps:
(A) a main body, the surface, the back surface opposite to the surface, and said surface and having a plating layer formed on each of the back side, are formed integrally with the main body portion, and a semi-conductor chip A lead frame comprising: a lead exposed from a sealing body that seals;
(B) after step (a), prior Symbol contacting the contact surface of the disconnect punch to the first portion in the plating layer formed on the surface of the lead to separate the lead from the body portion, the Obtaining a semiconductor device separated from the main body of the lead frame ;
(C) after the step (b), imaging the separated semiconductor device with a camera and inspecting the appearance of the separated semiconductor device using the acquired image;
Here,
Concavities and convexities are formed on the contact surface of the cutting punch used in the step (b),
The roughness of the first portion after pre Symbol (b) step, in the plating layer formed on the surface of the lead is greater than the roughness of the second portion where the contact surface is not in contact of the cutting punch ,
The first part is a position farther from the sealing body than the second part,
In the step (c), the surface of the lead is irradiated with light.
請求項1において、
前記リードの前記裏面は、実装基板に実装する際に、前記実装基板と対向する面であることを特徴とする半導体装置の製造方法。
In claim 1,
The method of manufacturing a semiconductor device , wherein the back surface of the lead is a surface facing the mounting substrate when mounted on the mounting substrate .
請求項2において、
前記(c)工程では、前記切り離された半導体装置をキャリアテープの窪みに収納し、前記キャリアテープの上方から前記窪みに収納された前記切り離された半導体装置に向かって、前記切り離された半導体装置の表面の法線方向とは異なる方向から前記切り離された半導体装置に前記光を照射し、前記カメラを用いて前記切り離された半導体装置の外観検査を行うことを特徴とする半導体装置の製造方法
In claim 2,
In step (c), and housing the disconnected semiconductor device in the recesses of the key Yariatepu, said housed in recess from said upper carrier tape towards the disconnected semiconductor device was the disconnected semiconductor the light is irradiated to the semiconductor device is disconnected from said direction different from the direction normal to the surface of the device, the manufacture of semiconductor devices and performs the visual inspection of the disconnected semiconductor device using the camera Way .
請求項3において、
前記キャリアテープは炭素を含んでいることを特徴とする半導体装置の製造方法。
In claim 3,
The method of manufacturing a semiconductor device, wherein the carrier tape contains carbon.
請求項3において、
前記キャリアテープの色は黒であることを特徴とする半導体装置の製造方法。
In claim 3,
A method of manufacturing a semiconductor device, wherein the color of the carrier tape is black.
請求項3において、
前記キャリアテープに収納された前記半導体装置を覆うように、前記キャリアテープにカバーテープが貼られていることを特徴とする半導体装置の製造方法。
In claim 3,
A method of manufacturing a semiconductor device, wherein a cover tape is attached to the carrier tape so as to cover the semiconductor device housed in the carrier tape.
請求項3において、
前記(a)工程の後、かつ前記(b)工程の前に、前記封止体の前記上面にマークを形成することを特徴とする半導体装置の製造方法。
In claim 3,
A method of manufacturing a semiconductor device, wherein a mark is formed on the upper surface of the sealing body after the step (a) and before the step (b).
請求項4乃至7の何れかにおいて、
前記切断パンチの接触面は、砥石で研磨されていることを特徴とする半導体装置の製造方法。
In any of claims 4 to 7,
A method of manufacturing a semiconductor device, wherein a contact surface of the cutting punch is polished with a grindstone.
請求項8において、
前記(b)工程により、前記リードの前記表面側に突出するバリを前記リードの先端部に形成することを特徴とする半導体装置の製造方法。
In claim 8,
The step (b), a method of manufacturing a semiconductor device and forming a burr protruding to the surface side of the lead-edge portion of the lead.
請求項1において、In claim 1,
前記切り離された半導体装置は、前記リードと、前記リードと一体に形成されたチップ搭載部と、前記チップ搭載部に搭載された前記半導体チップと、前記半導体チップと前記リードとを電気的に接続するワイヤとを有しており、The separated semiconductor device includes the lead, a chip mounting unit formed integrally with the lead, the semiconductor chip mounted on the chip mounting unit, and electrically connecting the semiconductor chip and the lead. And a wire to be
前記リードの前記表面は、前記チップ搭載部において前記半導体チップが搭載される面と同じ側の面であることを特徴とする半導体装置の製造方法。The method of manufacturing a semiconductor device, wherein the surface of the lead is a surface on the same side as a surface on which the semiconductor chip is mounted in the chip mounting portion.
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JPH0656168A (en) * 1992-04-30 1994-03-01 Minnesota Mining & Mfg Co <3M> Electronic parts transportation tape with peculiar pocket
JPH10148517A (en) * 1996-09-17 1998-06-02 Komatsu Ltd Image-pickup apparatus for object to be inspected, and inspection apparatus for semiconductor package
JP2003007948A (en) * 2001-06-26 2003-01-10 Shinko Electric Ind Co Ltd Die, manufacturing method for lead frame using the same, and lead frame
JP2003142641A (en) * 2001-10-31 2003-05-16 Mitsubishi Electric Corp Removal apparatus and method for tie bar after resin sealing for semiconductor device, and method for manufacturing semiconductor device
JP2005223305A (en) * 2004-01-09 2005-08-18 Denso Corp Resin-encapsulated semiconductor device, and method of manufacture the same

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JPH0163661U (en) * 1987-10-19 1989-04-24
JPH0338866A (en) * 1989-07-05 1991-02-19 Mitsubishi Electric Corp Manufacture equipment for semiconductor
JPH0656168A (en) * 1992-04-30 1994-03-01 Minnesota Mining & Mfg Co <3M> Electronic parts transportation tape with peculiar pocket
JPH10148517A (en) * 1996-09-17 1998-06-02 Komatsu Ltd Image-pickup apparatus for object to be inspected, and inspection apparatus for semiconductor package
JP2003007948A (en) * 2001-06-26 2003-01-10 Shinko Electric Ind Co Ltd Die, manufacturing method for lead frame using the same, and lead frame
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