JP3021691B2 - IC memory card - Google Patents

IC memory card

Info

Publication number
JP3021691B2
JP3021691B2 JP3008303A JP830391A JP3021691B2 JP 3021691 B2 JP3021691 B2 JP 3021691B2 JP 3008303 A JP3008303 A JP 3008303A JP 830391 A JP830391 A JP 830391A JP 3021691 B2 JP3021691 B2 JP 3021691B2
Authority
JP
Japan
Prior art keywords
conductor
memory
wiring board
conductor lead
printed wiring
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.)
Expired - Fee Related
Application number
JP3008303A
Other languages
Japanese (ja)
Other versions
JPH04251796A (en
Inventor
喜久雄 熊
浩司 作田
諭 石倉
晃 根津
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP3008303A priority Critical patent/JP3021691B2/en
Publication of JPH04251796A publication Critical patent/JPH04251796A/en
Application granted granted Critical
Publication of JP3021691B2 publication Critical patent/JP3021691B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H01L2224/50Tape automated bonding [TAB] connectors, i.e. film carriers; Manufacturing methods related thereto

Landscapes

  • Credit Cards Or The Like (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、メモリLSIチップを
多数個内蔵したICメモリカードに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC memory card containing a large number of memory LSI chips.

【0002】[0002]

【従来の技術】ICメモリカードは、RAM,ROMな
どのメモリLSIを内蔵した携帯型情報記憶装置として
多方面で利用されている。近年その用途の拡大に伴い、
記憶容量の大きい、すなわち大容量のICメモリカード
が強く要望されるようになってきた。このような大容量
のICメモリカードにおいては、多数個のメモリLSI
を一定面積のプリント配線板に高密度に実装しなければ
ならない。
2. Description of the Related Art An IC memory card is widely used as a portable information storage device incorporating a memory LSI such as a RAM and a ROM. In recent years, with the expansion of its use,
An IC memory card having a large storage capacity, that is, a large capacity has been strongly demanded. In such a large-capacity IC memory card, a large number of memory LSIs are required.
Must be densely mounted on a printed wiring board having a fixed area.

【0003】ところで、メモリLSIの高密度な実装方
法としては、メモリLSIのベアチップの電極に、いわ
ゆるフィルムキャリア方式で導体リードを接合し、前記
メモリLSIチップをプリント配線板に平面的に並べて
実装する方法が効果的とされている。以下図面を参照し
ながら、フィルムキャリア方式により多数のメモリLS
Iをプリント配線板に実装した、従来のICメモリカー
ドの構造について説明する。
As a high-density mounting method of a memory LSI, conductor leads are joined to electrodes of a bare chip of the memory LSI by a so-called film carrier method, and the memory LSI chips are mounted on a printed wiring board in a plane. The method is effective. Referring to the drawings, a large number of memories LS by a film carrier method will be described below.
The structure of a conventional IC memory card in which I is mounted on a printed wiring board will be described.

【0004】図5は従来のICメモリカードを示す断面
図である。図5において、31はケースでプリント配線
板32を収納している。プリント配線板32には導体配
線33が形成されている。34,34′はメモリLSI
チップで、プリント配線板32に平面的に配置されてい
る。メモリLSIチップ34の電極35には、フィルム
キャリア方式により金属突起36を介して、導体リード
37の一端部37aが接合されている。導体リード37
の他端部37bは、プリント配線板32の導体配線33
に接合されている。このようにベアチップを使用してい
るので、プリント配線板でのメモリLSIの占有面積は
比較的小さいものである。
FIG. 5 is a sectional view showing a conventional IC memory card. In FIG. 5, reference numeral 31 denotes a case in which a printed wiring board 32 is housed. Conductive wiring 33 is formed on the printed wiring board 32. 34, 34 'are memory LSIs
The chips are arranged on the printed wiring board 32 in a planar manner. One end 37a of a conductor lead 37 is joined to an electrode 35 of the memory LSI chip 34 via a metal projection 36 by a film carrier method. Conductor lead 37
The other end 37b of the printed wiring board 32
Is joined to. Since the bare chip is used as described above, the area occupied by the memory LSI on the printed wiring board is relatively small.

【0005】[0005]

【発明が解決しようとする課題】しかしながら上記従来
の構成では、メモリLSIチップがプリント配線板に平
面的に配置されているので、メモリLSIチップの数が
多くなるとその占有面積も拡大する。従って一定の面積
を有するプリント配線板に対し、実装できるメモリLS
Iチップの数には自ずと限界があった。またメモリLS
Iチップの数が増えると、メモリLSIチップの電極に
接合された導体リード間を電気的に接続するプリント配
線板の導体配線の距離が長くなって、配線スペースが増
えるので、信号の伝達速度も遅くなるという課題を有し
ていた。
However, in the above-described conventional configuration, since the memory LSI chips are arranged in a plane on the printed wiring board, the occupied area increases as the number of memory LSI chips increases. Therefore, a memory LS that can be mounted on a printed wiring board having a certain area
The number of I chips was naturally limited. Also, the memory LS
As the number of I chips increases, the distance of the conductor wiring of the printed wiring board for electrically connecting the conductor leads bonded to the electrodes of the memory LSI chip increases, and the wiring space increases, so that the signal transmission speed also increases. There was a problem of being slow.

【0006】本発明は上記従来の課題を解決するもの
で、メモリLSIの実装密度を飛躍的に高めて大容量化
を実現し、また配線スペースを大幅に減少して信号伝達
の高速化を実現し、さらに、導体リードの変形や位置ず
れを防止して組立て工程を容易にすると共に、導体リー
ドの平面占有面積をできる限り小さくしたICメモリカ
ードを実現することを目的としている。
SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and achieves a large capacity by dramatically increasing the mounting density of a memory LSI, and realizes a high-speed signal transmission by drastically reducing a wiring space. It is another object of the present invention to realize an IC memory card in which the deformation and displacement of the conductor leads are prevented to facilitate the assembling process, and the plane occupation area of the conductor leads is made as small as possible.

【0007】[0007]

【課題を解決するための手段】この目的を達成するため
に本発明のICメモリカードは、フィルムキャリア方式
によってメモリLSIチップの電極に導体リードの一端
部を接合し、導体リードの中間部および他端部は絶縁フ
ィルムで連結し、前記メモリLSIチップをプリント配
線板に複数個積層し、共通電極に接続した導体リードを
重ね合わせて導体配線に接合すると共に、導体リードの
中間部からの他端部の間の長さを下層段ほど短くし、導
体リードの中間部から他端部の間の平面占有長さを、ど
の積層段ともほぼ同一の長さにした構成である。
In order to achieve the above object, an IC memory card according to the present invention has one end of a conductor lead joined to an electrode of a memory LSI chip by a film carrier method, and an intermediate portion of the conductor lead and other parts. The ends are connected by an insulating film, a plurality of the memory LSI chips are stacked on a printed wiring board, the conductor leads connected to the common electrode are overlapped and joined to the conductor wiring, and the other end from the middle of the conductor lead In this configuration, the length between the portions is shorter in the lower layer, and the plane occupied length between the middle portion and the other end of the conductor lead is substantially the same as that of any of the stacked stages.

【0008】[0008]

【作用】この構成によって、限られた面積のプリント配
線板に多数のメモリLSIチップを搭載して大容量化を
実現し、積層した各チップ間の共通電極の導体リードを
直接接合しているので、配線スペースが減少して信号伝
達の高速化を実現し、また、導体リードの変形や位置ず
れを少なくして組立て工程を容易にし、さらに、下層段
の導体リードの中間部から他端部の間の平面占有長さ
を、上層段のそれとほぼ同一の長さに短くすることによ
り導体リードの平面占有面積が小さくなり、例えばRA
Mカードの場合には大きな電池を搭載することができ、
バックアップ寿命の長いICメモリカードを実現でき
る。
With this configuration, a large capacity is realized by mounting a large number of memory LSI chips on a printed wiring board having a limited area, and the conductor leads of the common electrode between the stacked chips are directly joined. In addition, the wiring space is reduced to realize faster signal transmission, and the deformation and displacement of the conductor leads are reduced to facilitate the assembling process. The plane occupied area between the conductor leads is reduced by shortening the plane occupied length between them to substantially the same length as that of the upper layer, for example, RA
In the case of an M card, a large battery can be installed,
An IC memory card with a long backup life can be realized.

【0009】[0009]

【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。
An embodiment of the present invention will be described below with reference to the drawings.

【0010】図1は本発明の一実施例におけるICメモ
リカードの一部を切欠いた斜視図、図2は同じく電気回
路のブロック図、図3は同じく部分断面図、図4は同じ
くメモリLSIチップの積層状態を示す部分斜視図であ
る。図1から図4において、1はケースでプリント配線
板2を収納している。プリント配線板2はメモリ回路部
3,コントロール回路部4,外部インタフェイス回路部
5で構成されている。メモリ回路部3は、複数のメモリ
LSIチップ6で構成され、同一種類のRAMチップを
2段に積層したものを多数組プリント配線板2に搭載し
ている。コントロール回路部4は、デコーダIC7等で
構成され、アドレス信号によるチップ選択、電源切換え
によるバックアップコントロール等を行う。外部インタ
フェイス回路部5は、接続コネクタ8等で構成され、接
続コネクタ8は他の機器や装置に取りつけられた接続部
(図示せず)に結合され、プリント配線板2に対して電
源の供給と信号の授受を行う。9はメモリ回路部3をバ
ックアップする電池で、ボタン型リチウム電池等を使用
し、ケース1に収納されている。電池9は、メモリ回路
部3に対して接続コネクタ8から電源が供給されないと
きに、バックアップ電源を供給する。
FIG. 1 is a partially cutaway perspective view of an IC memory card according to an embodiment of the present invention, FIG. 2 is a block diagram of an electric circuit, FIG. 3 is a partial cross-sectional view, and FIG. FIG. 4 is a partial perspective view showing a state of lamination. 1 to 4, reference numeral 1 denotes a case in which the printed wiring board 2 is housed. The printed wiring board 2 includes a memory circuit section 3, a control circuit section 4, and an external interface circuit section 5. The memory circuit unit 3 includes a plurality of memory LSI chips 6, and a large number of stacked same-type RAM chips are mounted on the printed wiring board 2. The control circuit unit 4 includes a decoder IC 7 and performs chip selection by an address signal, backup control by power supply switching, and the like. The external interface circuit unit 5 includes a connection connector 8 and the like. The connection connector 8 is coupled to a connection unit (not shown) attached to another device or apparatus, and supplies power to the printed wiring board 2. And the exchange of signals. Reference numeral 9 denotes a battery for backing up the memory circuit unit 3, which is housed in the case 1 using a button type lithium battery or the like. The battery 9 supplies backup power when no power is supplied to the memory circuit unit 3 from the connection connector 8.

【0011】次に、メモリLSIチップ6の積層状態の
構成について述べる。メモリLSIチップ6は他のメモ
リLSIチップ6′の上に、それぞれの電極配列が同一
になる方向に積層されている。10はメモリLSIチッ
プ6の共通電極で、フィルムキャリア方式により、金属
突起11を介して導体リード12の一端部12aが接合
されている。13はメモリLSIチップ6の別の共通電
極で、導体リード12と同様にして導体リード14が接
合されている。15,16は絶縁フィルムで、それぞれ
導体リードの中間部12b,14bおよび導体リードの
他端部12c,14cを連結している。17はメモリL
SIチップ6の非共通電極で、金属突起18を介して導
体リード19の一端部19aが接合されている。導体リ
ード19は、絶縁フィルム15上で導体リード20,2
1に分岐している。導体リード20,21の他端部20
c,21cは絶縁フィルム16によって連結されてい
る。前記の構成はメモリLSIチップ6′も同様であ
る。22,22′は樹脂等で構成された絶縁部材であ
り、電極10、導体リードの一端部12a等を保護する
役目をする。
Next, the structure of the memory LSI chip 6 in a stacked state will be described. The memory LSI chip 6 is stacked on another memory LSI chip 6 'in a direction in which the respective electrode arrangements are the same. Reference numeral 10 denotes a common electrode of the memory LSI chip 6, to which one end 12a of the conductor lead 12 is joined via a metal projection 11 by a film carrier method. Reference numeral 13 denotes another common electrode of the memory LSI chip 6, to which a conductor lead 14 is joined in the same manner as the conductor lead 12. Reference numerals 15 and 16 denote insulating films connecting the middle portions 12b and 14b of the conductor leads and the other end portions 12c and 14c of the conductor leads, respectively. 17 is a memory L
One end 19a of a conductor lead 19 is joined to a non-common electrode of the SI chip 6 via a metal projection 18. The conductor leads 19 are connected to the conductor leads 20 and 2 on the insulating film 15.
It branches to 1. The other ends 20 of the conductor leads 20 and 21
c and 21c are connected by the insulating film 16. The above configuration is the same for the memory LSI chip 6 '. Reference numerals 22 and 22 'denote insulating members made of resin or the like, which serve to protect the electrode 10, one end 12a of the conductor lead, and the like.

【0012】次に、導体リード12等の、プリント配線
板2への電気的接続状態について説明する。導体リード
12,12′は、メモリLSIチップ6,6′の共通電
極10,10′に接続しているので、プリント配線板2
の同じ導体配線23に接続される。導体リード14,1
4′も同様に導体配線24に接続される。一方非共通電
極17,17′に接続している導体リード19,19′
は、同一の導体配線に接続することができない。このた
め、導体リード19を分岐させた導体リード20,21
のうち、導体リード20を導体配線25に接続して、導
体リード21は、その他端部21cの付近を残して部分
的に切断される。また導体リード19′を分岐させた導
体リード20′,21′のうち、導体リード21′を導
体配線26に接続し、導体リード20′はその他端部2
0′c付近を残して部分的に切断される。即ち、非共通
電極17が導体配線25と、非共通電極17′が別の導
体配線26とそれぞれ電気的に接続されることになる。
Next, the electrical connection state of the conductor leads 12 and the like to the printed wiring board 2 will be described. Since the conductor leads 12, 12 'are connected to the common electrodes 10, 10' of the memory LSI chips 6, 6 ', the printed wiring board 2
Are connected to the same conductor wiring 23. Conductor leads 14, 1
4 'is similarly connected to the conductor wiring 24. On the other hand, the conductor leads 19, 19 'connected to the non-common electrodes 17, 17'
Cannot be connected to the same conductor wiring. For this reason, the conductor leads 20, 21 obtained by branching the conductor lead 19 are used.
Of these, the conductor lead 20 is connected to the conductor wiring 25, and the conductor lead 21 is partially cut except for the vicinity of the other end 21c. Also, of the conductor leads 20 'and 21' obtained by branching the conductor lead 19 ', the conductor lead 21' is connected to the conductor wiring 26, and the conductor lead 20 'is connected to the other end 2a.
It is partially cut leaving around 0'c. That is, the non-common electrode 17 is electrically connected to the conductor wiring 25, and the non-common electrode 17 'is electrically connected to another conductor wiring 26.

【0013】次に、導体リード12等のプリント配線板
2への接合状態について述べる。導体リード12,1
2′はそれぞれの中間部12b,12′bからそれぞれ
の他端部12c,12′cの間を部分的に重ね合わせて
導体配線23にはんだ接合されている。同様に導体リー
ド14,14′も導体配線24の上にはんだ接合されて
いる。そして、導体リードの中間部12bから他端部1
2cまでの長さよりも、導体リードの中間部12′bか
ら他端部12′cまでの長さを短くし、上層段である導
体リード12の中間部12bから他端部12cの間の平
面占有長さLに比べて、下層段である導体リード12′
の中間部12′bから他端部12′cの間の平面占有長
さL′をほぼ同一の長さにした構成である。
Next, the state of bonding the conductor leads 12 and the like to the printed wiring board 2 will be described. Conductor leads 12, 1
2 'is soldered to the conductor wiring 23 by partially overlapping between the respective intermediate portions 12b, 12'b and the other end portions 12c, 12'c. Similarly, the conductor leads 14 and 14 ′ are also soldered on the conductor wiring 24. Then, from the intermediate portion 12b of the conductor lead to the other end 1
The length from the middle portion 12'b to the other end portion 12'c of the conductor lead is made shorter than the length up to 2c, and the plane between the middle portion 12b and the other end portion 12c of the conductor lead 12, which is the upper layer, is formed. Compared to the occupied length L, the conductor lead 12 ′ which is a lower layer
The length L 'occupied by the plane between the intermediate portion 12'b and the other end 12'c is substantially the same.

【0014】以上のように本実施例によれば、メモリL
SIチップ6,6′を積層することにより、一定面積の
プリント配線板2に多数のメモリLSIチップ6を搭載
できるので、大容量のICメモリカードを実現でき、共
通電極10,10′に接続した導体リード12,12′
を、重ね合わせて導体配線23に接合しているので、配
線スペースが減少して信号伝達の高速化を実現できる。
また、導体リードの中間部12b,14bを絶縁フィル
ム15で連結し、導体リードの他端部12c,14cを
絶縁フィルム16で連結しているので、導体リード1
2,14の変形が少なく、はんだ付け等の組立て工程が
容易となって低コストのICメモリカードを実現でき、
さらに、上層段および下層段の導体リード12,12′
について、中間部12b,12′bから他端部12c,
12′cまでの、それぞれの平面占有長さL,L′をほ
ぼ同一にすることにより、下層段である導体リード1
2′等の平面占有面積が小さくなるので、電池9をより
大きくして搭載することができ、バックアップ寿命の長
いICメモリカードを実現できる。
As described above, according to this embodiment, the memory L
By stacking the SI chips 6, 6 ', a large number of memory LSI chips 6 can be mounted on the printed wiring board 2 having a fixed area, so that a large-capacity IC memory card can be realized and connected to the common electrodes 10, 10'. Conductor leads 12, 12 '
Are superimposed and joined to the conductor wiring 23, so that the wiring space is reduced and the speed of signal transmission can be increased.
Further, since the middle portions 12b and 14b of the conductor leads are connected by the insulating film 15, and the other end portions 12c and 14c of the conductor leads are connected by the insulating film 16,
2 and 14 are less deformed, the assembly process such as soldering is easy, and a low-cost IC memory card can be realized.
Further, the upper and lower conductor leads 12, 12 'are provided.
From the middle part 12b, 12'b to the other end 12c,
By making the plane occupied lengths L and L 'up to 12'c substantially the same, the conductor lead 1 as the lower layer can be formed.
Since the area occupied by planes such as 2 'is reduced, the battery 9 can be mounted with a larger size, and an IC memory card having a long backup life can be realized.

【0015】[0015]

【発明の効果】本発明のICメモリカードは、メモリL
SIチップの電極にフィルムキャリア方式により導体リ
ードの一端部を接合し、このメモリLSIチップをプリ
ント配線板に複数個積層し、メモリLSIチップの共通
電極に接合した導体リードの中間部および他端部を絶縁
フィルムで連結し、この導体リードの中間部および他端
部の間を部分的に重ね合わせてプリント配線板の導体配
線に接合すると共に、導体リードの中間部から他端部の
間の長さを下層段ほど短くし、導体リードの中間部から
他端部の間の平面占有長さをどの積層段とも略同一にし
た構成である。従って本発明は、一定面積のプリント配
線板に多数のメモリLSIチップを搭載して大容量化を
実現し、プリント配線板における配線スペースが小さく
なるため、信号伝達の速いICメモリカードを実現で
き、また、導体リードの中間部および他端部を絶縁フィ
ルムで連結しているのではんだ接合等の組立て工程が容
易となって低コスト化を実現でき、さらに導体リードの
中間部から他端部の間の平面占有長さをどの積層段とも
略同一にしてあるので、導体リードの平面占有面積が小
さくなり、例えばRAMカードの場合にはより大きな電
池を搭載することができ、バックアップ寿命の長いIC
メモリカードを実現できるなどの優れた効果を奏する。
The IC memory card of the present invention has a memory L
One end of the conductor lead is joined to the electrode of the SI chip by a film carrier method, a plurality of the memory LSI chips are stacked on a printed wiring board, and the middle and the other end of the conductor lead joined to the common electrode of the memory LSI chip Are connected to each other with an insulating film, the intermediate portion and the other end portion of the conductor lead are partially overlapped and joined to the conductor wiring of the printed wiring board, and the length between the intermediate portion and the other end portion of the conductor lead is In this configuration, the lower the level, the shorter the lower layer, and the plane occupied length between the middle part and the other end of the conductor lead is substantially the same as that of any of the laminated steps. Therefore, according to the present invention, a large capacity is realized by mounting a large number of memory LSI chips on a printed wiring board having a fixed area, and a wiring space in the printed wiring board is reduced, so that an IC memory card with high signal transmission can be realized. Also, since the middle part and the other end of the conductor lead are connected by an insulating film, an assembling process such as soldering is facilitated, so that cost reduction can be realized. The plane occupied length of each of the stacked stages is substantially the same, so that the plane occupied area of the conductor leads is reduced. For example, in the case of a RAM card, a larger battery can be mounted and an IC having a long backup life
It has excellent effects such as realizing a memory card.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例におけるICメモリカードの
一部を切り欠いた斜視図
FIG. 1 is a partially cutaway perspective view of an IC memory card according to an embodiment of the present invention.

【図2】同メモリカードの電気回路のブロック図FIG. 2 is a block diagram of an electric circuit of the memory card.

【図3】同メモリカードの部分断面図FIG. 3 is a partial cross-sectional view of the memory card.

【図4】同メモリカードのメモリLSIチップの積層状
態を示す部分斜視図
FIG. 4 is a partial perspective view showing a stacked state of a memory LSI chip of the memory card.

【図5】従来のICメモリカードにおける部分断面図FIG. 5 is a partial cross-sectional view of a conventional IC memory card.

【符号の説明】[Explanation of symbols]

2 プリント配線板 6,6′ メモリLSIチップ 10,10′ 共通電極 12 導体リード 12a 導体リードの一端部 12b 導体リードの中間部 12c 導体リードの他端部 15,16 絶縁フィルム 23 導体配線 L,L′ 導体リードの中間部からの他端部の間の平面
占有長さ
2 Printed wiring board 6, 6 'Memory LSI chip 10, 10' Common electrode 12 Conductor lead 12a One end of conductor lead 12b Intermediate part of conductor lead 12c Other end of conductor lead 15, 16 Insulating film 23 Conductor wiring L, L ′ Plane occupied length between the middle and the other end of the conductor lead

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI H01L 25/18 (72)発明者 根津 晃 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平2−217296(JP,A) 実開 平2−8977(JP,U) 実開 平2−139784(JP,U) 特許2682152(JP,B2) (58)調査した分野(Int.Cl.7,DB名) B42D 15/10 521 G06K 19/077 G11C 5/00 301 H01L 25/065 H01L 25/07 H01L 25/18 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI H01L 25/18 (72) Inventor Akira Nezu 1006 Ojidoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References Special JP-A-2-217296 (JP, A) JP-A-2-8977 (JP, U) JP-A-2-139784 (JP, U) Patent 2682152 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) B42D 15/10 521 G06K 19/077 G11C 5/00 301 H01L 25/065 H01L 25/07 H01L 25/18

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】メモリLSIチップの電極に導体リードの
一端部を接合し、前記メモリLSIチップを、前記電極
の配列が同一になる方向にプリント配線板に複数個積層
し、前記メモリLSIチップの共通電極に接続した前記
導体リードの中間部および他端部を絶縁フィルムで連結
し、前記導体リードの中間部から他端部の間を、部分的
に重ね合わせて前記プリント配線板の導体配線に接合し
た構成であって、前記導体リードの中間部から他端部の
間の長さを下層段ほど短くし、前記導体リードの中間部
から他端部の間の平面占有長さが、どの積層段とも略同
一であることを特徴とするICメモリカード。
An end of a conductor lead is joined to an electrode of a memory LSI chip, and a plurality of the memory LSI chips are stacked on a printed wiring board in a direction in which the arrangement of the electrodes is the same. The middle part and the other end of the conductor lead connected to the common electrode are connected by an insulating film, and the part between the middle part and the other end of the conductor lead is partially overlapped with the conductor wiring of the printed wiring board. The length between the middle part and the other end of the conductor lead is reduced toward the lower layer, and the plane occupied length between the middle part and the other end of the conductor lead is An IC memory card, wherein the steps are substantially the same.
JP3008303A 1991-01-28 1991-01-28 IC memory card Expired - Fee Related JP3021691B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3008303A JP3021691B2 (en) 1991-01-28 1991-01-28 IC memory card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3008303A JP3021691B2 (en) 1991-01-28 1991-01-28 IC memory card

Publications (2)

Publication Number Publication Date
JPH04251796A JPH04251796A (en) 1992-09-08
JP3021691B2 true JP3021691B2 (en) 2000-03-15

Family

ID=11689386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3008303A Expired - Fee Related JP3021691B2 (en) 1991-01-28 1991-01-28 IC memory card

Country Status (1)

Country Link
JP (1) JP3021691B2 (en)

Also Published As

Publication number Publication date
JPH04251796A (en) 1992-09-08

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