JPH0715046A - Injection molded printed board - Google Patents
Injection molded printed boardInfo
- Publication number
- JPH0715046A JPH0715046A JP5154875A JP15487593A JPH0715046A JP H0715046 A JPH0715046 A JP H0715046A JP 5154875 A JP5154875 A JP 5154875A JP 15487593 A JP15487593 A JP 15487593A JP H0715046 A JPH0715046 A JP H0715046A
- Authority
- JP
- Japan
- Prior art keywords
- bonding
- die
- led
- recess
- molded printed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 10
- 239000007924 injection Substances 0.000 title claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 description 14
- 239000002184 metal Substances 0.000 description 13
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 239000013078 crystal Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 1
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/73—Means 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
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0284—Details of three-dimensional rigid printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
Landscapes
- Led Device Packages (AREA)
- Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
- Structure Of Printed Boards (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、射出成形プリント基板
に関するもので、特に、ＬＥＤチップの実装構造に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection-molded printed circuit board, and more particularly to an LED chip mounting structure.
【０００２】[0002]
【従来の技術】射出成形プリント基板は射出成形による
成形部品上に導体パターンを形成したもので、プリント
基板が不要となるため、機器の小型化、部品点数及び組
立工程の削減が図れるという特徴を有するものである。
射出成形プリント基板の本体は射出成形により形成さ
れ、基板上に凹凸形状を容易に形成することができるた
め、ＬＥＤを実装する場合は、射出成形プリント基板上
に凹部を形成して実装する方法が多く用いられている。
ここでは、射出成形プリント基板にかぎらず、一般に、
基板上に凹部を形成してＬＥＤを実装した従来例につい
て説明する。2. Description of the Related Art An injection-molded printed circuit board is one in which a conductor pattern is formed on a molded part formed by injection molding, and the printed circuit board is not required. Therefore, the device can be downsized and the number of parts and the assembly process can be reduced. I have.
Since the main body of the injection-molded printed circuit board is formed by injection molding and the uneven shape can be easily formed on the substrate, when mounting the LED, a method of forming a recessed part on the injection-molded printed circuit board and mounting it. Many are used.
Here, not only injection-molded printed circuit boards, but generally,
A conventional example in which a recess is formed on a substrate and an LED is mounted will be described.
【０００３】図２は、絶縁基板上に凹部を形成した従来
例（実公昭51-11340）を示すもので、１は略直方体状の
絶縁基板、１ａは平面視略長方形状の凹部、２，３はＬ
ＥＤチップと外部回路を接続する金属層、４はＬＥＤチ
ップ（発光素子ペレット）、５はボンディングワイヤ、
６は透明樹脂、７，８は外部端子である。凹部１ａの内
面のうち、金属層２，３が形成されている面は、ＬＥＤ
チップ４から放出された光が、絶縁基板１の表面に対し
て略垂直方向に反射されるように、その形状が考慮され
ている。金属層２，３は、絶縁基板１の表面から凹部１
ａの平坦な底面にまで延設されており、金属層２はＬＥ
Ｄチップ４の底部に接続されていると共に、金属層３は
ボンディングワイヤ５を介してＬＥＤチップ４の上面に
接続されている。略倒立Ｌ字状の外部端子７，８は、そ
れぞれ絶縁基板１上の金属層２，３の上面に接合されて
いる。また、凹部１ａは、ＬＥＤチップ４を実装した
後、透明樹脂６で満たされ封止される。FIG. 2 shows a conventional example in which a concave portion is formed on an insulating substrate (Actual Publication No. Sho 51-11340), 1 is an insulating substrate having a substantially rectangular parallelepiped shape, 1a is a concave portion having a substantially rectangular shape in plan view, 2, 3 is L
Metal layer for connecting ED chip and external circuit, 4 LED chip (light emitting element pellet), 5 bonding wire,
6 is a transparent resin, and 7 and 8 are external terminals. Of the inner surface of the recess 1a, the surface on which the metal layers 2 and 3 are formed is the LED.
The shape is taken into consideration so that the light emitted from the chip 4 is reflected in a direction substantially perpendicular to the surface of the insulating substrate 1. The metal layers 2 and 3 are formed from the surface of the insulating substrate 1 to the recess 1
The metal layer 2 is LE.
The metal layer 3 is connected to the bottom of the D chip 4 and the upper surface of the LED chip 4 via a bonding wire 5. The substantially inverted L-shaped external terminals 7 and 8 are joined to the upper surfaces of the metal layers 2 and 3 on the insulating substrate 1, respectively. The recess 1a is filled with the transparent resin 6 and sealed after the LED chip 4 is mounted.
【０００４】次に、図３に基づいて異なる実装例（特公
昭57-11510）について説明する。図３に示す例は、単結
晶基板９上で絶縁物１０によって領域分離された分離領
域１１にＬＥＤチップ実装用の穴１２を形成し、その穴
１２の表面に反射膜１３を積層した後、ＬＥＤチップ１
４をダイボンドペースト１５を介して穴１２の底部に実
装したものである。この例で、ＬＥＤチップ１４は、反
射膜１３及び分離領域１１を介して単結晶基板９表面に
形成された金属配線１６と接続されていると共に、ボン
ディングワイヤ１７によって単結晶基板９表面の絶縁膜
１８上に形成された金属配線１９と接続されている。ボ
ンディングワイヤ１７とＬＥＤチップ１４はパッド２０
を介して接続されている。Next, a different mounting example (Japanese Patent Publication No. 57-11510) will be described with reference to FIG. In the example shown in FIG. 3, a hole 12 for mounting an LED chip is formed in a separation region 11 separated by an insulator 10 on a single crystal substrate 9, and a reflection film 13 is laminated on the surface of the hole 12, LED chip 1
4 is mounted on the bottom of the hole 12 via the die bond paste 15. In this example, the LED chip 14 is connected to the metal wiring 16 formed on the surface of the single crystal substrate 9 via the reflection film 13 and the isolation region 11, and is also connected to the insulating film on the surface of the single crystal substrate 9 by the bonding wire 17. It is connected to the metal wiring 19 formed on 18. Bonding wire 17 and LED chip 14 are pads 20
Connected through.
【０００５】[0005]
【発明が解決しようとする課題】図２に示した従来例で
は、ＬＥＤチップ４が接合される金属層２のダイパッド
部２ａと、ボンディングワイヤ５が接合される金属層３
のパッド部３ａが略同一高さに形成されているため、Ｌ
ＥＤチップ４をAgペースト等のダイボンドペーストを介
してダイボンディングする際、ダイボンドペーストが流
れてパッド部３ａに付着し、ワイヤボンディングできな
くなることがあった。また、ダイパッド部２ａとパッド
部３ａを凹部１ａ内に配置しているため凹部１ａが大き
くなり、ＬＥＤチップ４から放出された光は分散されて
輝度が低下してしまうという問題点もあった。In the conventional example shown in FIG. 2, the die pad portion 2a of the metal layer 2 to which the LED chip 4 is joined and the metal layer 3 to which the bonding wire 5 is joined.
Since the pad portions 3a of are formed at substantially the same height,
When the ED chip 4 is die-bonded through a die-bonding paste such as Ag paste, the die-bonding paste may flow and adhere to the pad portion 3a, which may prevent wire bonding. Further, since the die pad portion 2a and the pad portion 3a are arranged in the recessed portion 1a, the recessed portion 1a becomes large, and the light emitted from the LED chip 4 is dispersed and the brightness is lowered.
【０００６】図３に示した例では、ボンディングワイヤ
１７が接合される金属配線１９のパッド部１９ａが単結
晶基板９の絶縁膜１８上に形成されており、ボンディン
グワイヤ１７を樹脂封止する場合、単結晶基板９上に封
止樹脂を盛り上げることになる。このため、封止樹脂が
流れて他の部分に付着したり、封止が不完全になる可能
性があった。In the example shown in FIG. 3, when the pad portion 19a of the metal wiring 19 to which the bonding wire 17 is joined is formed on the insulating film 18 of the single crystal substrate 9, the bonding wire 17 is sealed with resin. , The sealing resin is piled up on the single crystal substrate 9. Therefore, there is a possibility that the sealing resin may flow and adhere to other parts, or the sealing may be incomplete.
【０００７】本発明は、上記問題点に鑑みなされたもの
で、その目的とするところは、Agペースト等のダイボン
ドペーストの流れ出しによるワイヤボンディング不良が
防止できると共に、輝度アップが図れる射出成形プリン
ト基板の構造を提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to prevent a wire bonding failure due to the outflow of a die bond paste such as Ag paste, and to improve the brightness of an injection molded printed circuit board. To provide the structure.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するた
め、本願発明の射出成形プリント基板は、射出成形プリ
ント基板の表面に形成されたＬＥＤ実装用凹部と、その
ＬＥＤ実装用凹部の底面に形成されたダイボンド用凹部
と、前記射出成形プリント基板の表面から前記ＬＥＤ実
装用凹部の底面に配設されたボンディングワイヤ接合用
導体パターンと、前記射出成形プリント基板の表面から
前記ダイボンド用凹部の底面に配設されたダイボンド用
導体パターンを具備したことを特徴とするものである。In order to solve the above-mentioned problems, an injection-molded printed circuit board of the present invention is provided with an LED mounting recess formed on the surface of the injection-molded printed circuit board and a bottom surface of the LED mounting recess. Formed die-bonding concave portion, a bonding wire bonding conductor pattern disposed on the surface of the injection-molded printed circuit board to the bottom surface of the LED mounting concave portion, and from the surface of the injection-molded printed circuit board to the bottom surface of the die-bonding concave portion. It is characterized in that it is provided with a conductor pattern for die bonding arranged.
【０００９】[0009]
【作用】図１に示すように、本願発明に係る射出成形プ
リント基板２１では、ＬＥＤ実装用凹部２２内にボンデ
ィングワイヤ接合用導体パターン２６のパッド部２６ａ
が形成されていると共に、ＬＥＤ実装用凹部２２の底面
に形成されたダイボンド用凹部２３内にダイボンド用導
体パターン２５のダイパッド部２５ａが形成されている
ため、Agペースト等のダイボンドペーストがＬＥＤ実装
用凹部２２の底面に形成されたボンディングワイヤ接合
用のパッド部２６ａに付着することがないため、ダイボ
ンドペーストの付着によるワイヤボンディング不良は発
生しない。As shown in FIG. 1, in the injection molded printed board 21 according to the present invention, the pad portion 26a of the bonding wire bonding conductor pattern 26 is provided in the LED mounting recess 22.
And the die pad portion 25a of the die-bonding conductor pattern 25 is formed in the die-bonding recess 23 formed on the bottom surface of the LED-mounting recess 22, the die-bonding paste such as Ag paste is used for LED mounting. Since it does not adhere to the pad portion 26a for bonding wire bonding formed on the bottom surface of the concave portion 22, wire bonding failure due to the attachment of the die bond paste does not occur.
【００１０】[0010]
【実施例】本願発明に係る射出成形プリント基板を使用
してＬＥＤチップを実装した一実施例を図１に示す。
（ａ）はＬＥＤ実装用凹部の構造を示す斜視図、（ｂ）
はその断面図である。図において、２１は液晶ポリマー
等の高耐熱性樹脂製の射出成形プリント基板、２２は略
倒立円錐状のＬＥＤ実装用凹部、２３は略倒立円錐状の
ダイボンド用凹部、２３ａはダイボンド用凹部２３の内
面、２４はＬＥＤチップ、２５はダイボンド用導体パタ
ーン、２６はボンディングワイヤ接合用導体パターン、
２５ａはダイボンド用導体パターン２５の端部に形成さ
れたダイパッド部、２６ａはボンディングワイヤ接合用
導体パターン２６の端部に形成されたパッド部、２７は
ボンディングワイヤ、２８は透明なエポキシ樹脂等の封
止樹脂である。FIG. 1 shows an embodiment in which an LED chip is mounted using the injection-molded printed board according to the present invention.
(A) is a perspective view showing the structure of the LED mounting recess, (b)
Is a sectional view thereof. In the figure, 21 is an injection-molded printed circuit board made of a highly heat-resistant resin such as liquid crystal polymer, 22 is a substantially inverted conical recess for mounting LEDs, 23 is a substantially inverted conical recess for die bonding, and 23a is a recess 23 for die bonding. Inner surface, 24 is an LED chip, 25 is a die-bonding conductor pattern, 26 is a bonding wire joining conductor pattern,
Reference numeral 25a is a die pad portion formed at an end portion of the die-bonding conductor pattern 25, 26a is a pad portion formed at an end portion of the bonding wire joining conductor pattern 26, 27 is a bonding wire, and 28 is a sealant such as a transparent epoxy resin. It is a stop resin.
【００１１】図１に示すように、射出成形プリント基板
２１上に形成された倒立円錐台状のＬＥＤ実装用凹部２
２の底面に、さらに倒立円錐台状のダイボンド用凹部２
３が形成されている。ダイボンド用導体パターン２５は
射出成形プリント基板２１の表面からダイボンド用凹部
２３の底面にまで延設されており、その端部にはダイパ
ッド部２５ａが形成されている。一方、ボンディングワ
イヤ接合用導体パターン２６は、射出成形プリント基板
２１の表面からＬＥＤ実装用凹部２２の底面にまで延設
されており、その端部にはパッド部２６ａが形成されて
いる。As shown in FIG. 1, an inverted truncated cone-shaped LED mounting recess 2 formed on an injection molded printed circuit board 21.
On the bottom surface of 2, the inverted cone-shaped recess 2 for die bonding is further formed.
3 is formed. The die-bonding conductor pattern 25 extends from the surface of the injection-molded printed circuit board 21 to the bottom surface of the die-bonding recess 23, and a die pad portion 25a is formed at the end thereof. On the other hand, the bonding wire bonding conductor pattern 26 extends from the surface of the injection-molded printed board 21 to the bottom surface of the LED mounting recess 22, and a pad portion 26a is formed at the end thereof.
【００１２】上記構成の射出成形プリント基板２１に対
し、ＬＥＤチップ２４は、ダイボンド用凹部２３の底面
に形成されたダイパッド部２５ａ上にAgペースト等のダ
イボンドペーストを介して接合された後、ボンディング
ワイヤ２７を介してＬＥＤ実装用凹部２２の底面に形成
されたパッド部２６ａに接続される。この時、ボンディ
ングワイヤ２７がＬＥＤ実装用凹部２２内に収まるよう
にボンディングを行えば、樹脂封止する場合も封止樹脂
２８がＬＥＤ実装用凹部２２から流出することがない。After the LED chip 24 is bonded to the injection-molded printed circuit board 21 having the above-mentioned structure on the die pad portion 25a formed on the bottom surface of the die-bonding recess 23 via a die-bonding paste such as Ag paste, a bonding wire is formed. It is connected via 27 to a pad portion 26 a formed on the bottom surface of the LED mounting recess 22. At this time, if the bonding is carried out so that the bonding wire 27 fits within the LED mounting recess 22, the sealing resin 28 will not flow out from the LED mounting recess 22 even when resin sealing is performed.
【００１３】また、パッド部２６ａの形成位置に比べ、
ダイパッド部２５ａの形成位置が低いため、ＬＥＤチッ
プ２４のダイボンド時、Agペースト等のダイボンドペー
ストがＬＥＤ実装用凹部２２の底面に形成されたパッド
部２６ａに付着することを防止することができる。さら
に、ダイボンド用凹部２３は、その内部にＬＥＤチップ
２４が実装できればよいので、そのサイズを小さくする
ことができるため、ＬＥＤチップ２４の近傍に、ＬＥＤ
放出光の反射面として、ダイボンド用凹部２３の内面２
３ａを配置することができる。これにより、ＬＥＤチッ
プ２４の放出光を広い範囲に拡散させずにＬＥＤチップ
２４の上方に反射させることができ、輝度をアップさせ
ることができる。Further, as compared with the formation position of the pad portion 26a,
Since the formation position of the die pad portion 25a is low, it is possible to prevent the die bond paste such as Ag paste from adhering to the pad portion 26a formed on the bottom surface of the LED mounting recess 22 during die bonding of the LED chip 24. Further, the die-bonding recessed portion 23 can be reduced in size because the LED chip 24 can be mounted inside the recessed portion 23 for die bonding.
The inner surface 2 of the recess 23 for die bonding is used as a reflection surface for the emitted light.
3a can be arranged. Thereby, the light emitted from the LED chip 24 can be reflected above the LED chip 24 without being diffused in a wide range, and the brightness can be increased.
【００１４】なお、ＬＥＤ実装用凹部２２やダイボンド
用凹部２３及び導体パターンの形状は実施例に限定され
ない。The shapes of the LED mounting recess 22, the die bonding recess 23, and the conductor pattern are not limited to those in the embodiment.
【００１５】[0015]
【発明の効果】以上のように、本願発明の射出成形プリ
ント基板を用いてＬＥＤチップを実装すれば、Agペース
ト等のダイボンドペーストの流れ出しによるワイヤボン
ディング不良が防止できると共に、輝度アップを図るこ
とができる。As described above, by mounting an LED chip using the injection-molded printed circuit board of the present invention, it is possible to prevent wire bonding failure due to the outflow of die bond paste such as Ag paste, and to improve the brightness. it can.
【図１】本願発明に係る射出成形プリント基板の一実施
例を示す構造図で、（ａ）は斜視図、（ｂ）は断面図で
ある。FIG. 1 is a structural view showing an embodiment of an injection-molded printed circuit board according to the present invention, in which (a) is a perspective view and (b) is a sectional view.
【図２】従来のＬＥＤ実装方法の一例を示す断面図であ
る。FIG. 2 is a cross-sectional view showing an example of a conventional LED mounting method.
【図３】従来のＬＥＤ実装方法の異なる例を示す断面図
である。FIG. 3 is a sectional view showing a different example of a conventional LED mounting method.
１ 絶縁基板 １ａ 凹部 ２，３ 金属層 ２ａ ダイパッド部 ３ａ パッド部 ４ ＬＥＤチップ ５ ボンディングワイヤ ６ 透明樹脂 ７，８ 外部端子 ９ 単結晶基板 １０ 絶縁物 １１ 分離領域 １２ 穴 １３ 反射膜 １４ ＬＥＤチップ １５ ダイボンドペースト １６ 金属配線 １７ ボンディングワイヤ １８ 絶縁膜 １９ 金属配線 １９ａ パッド部 ２０ パッド ２１ 射出成形プリント基板 ２２ ＬＥＤ実装用凹部 ２３ ダイボンド用凹部 ２３ａ 内面 ２４ ＬＥＤチップ ２５ ダイボンド用導体パターン ２５ａ ダイパッド部 ２６ ボンディングワイヤ接合用導体パター
ン ２７ ボンディングワイヤ ２８ 封止樹脂1 Insulating Substrate 1a Recess 2,3 Metal Layer 2a Die Pad 3a Pad 4 LED Chip 5 Bonding Wire 6 Transparent Resin 7,8 External Terminal 9 Single Crystal Substrate 10 Insulator 11 Separation Area 12 Hole 13 Reflective Film 14 LED Chip 15 Die Bond Paste 16 Metal wiring 17 Bonding wire 18 Insulating film 19 Metal wiring 19a Pad part 20 Pad 21 Injection molded printed circuit board 22 LED mounting recess 23 Die bond recess 23a Inner surface 24 LED chip 25 Die bond conductor pattern 25a Die pad part 26 Bonding wire bonding Conductor pattern 27 Bonding wire 28 Sealing resin
Claims (1)
たＬＥＤ実装用凹部と、そのＬＥＤ実装用凹部の底面に
形成されたダイボンド用凹部と、前記射出成形プリント
基板の表面から前記ＬＥＤ実装用凹部の底面に配設され
たボンディングワイヤ接合用導体パターンと、前記射出
成形プリント基板の表面から前記ダイボンド用凹部の底
面に配設されたダイボンド用導体パターンを具備したこ
とを特徴とする射出成形プリント基板。1. A recess for LED mounting formed on the surface of an injection molded printed circuit board, a recess for die bonding formed on the bottom surface of the recess for LED mounting, and a recess for mounting LED from the surface of the injection molded printed circuit board. An injection-molded printed circuit board, comprising: a bonding wire bonding conductor pattern disposed on a bottom surface of the die-bonding wire; and a die-bonding conductor pattern disposed from a surface of the injection-molded printed circuit board to a bottom surface of the die-bonding recess. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5154875A JP2914097B2 (en) | 1993-06-25 | 1993-06-25 | Injection molded printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5154875A JP2914097B2 (en) | 1993-06-25 | 1993-06-25 | Injection molded printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0715046A true JPH0715046A (en) | 1995-01-17 |
| JP2914097B2 JP2914097B2 (en) | 1999-06-28 |
Family
ID=15593850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5154875A Expired - Fee Related JP2914097B2 (en) | 1993-06-25 | 1993-06-25 | Injection molded printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2914097B2 (en) |
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| Publication number | Publication date |
|---|---|
| JP2914097B2 (en) | 1999-06-28 |
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