JP2004221294A - Ultrasonic bonding tool and method for manufacturing semiconductor by using the same - Google Patents
Ultrasonic bonding tool and method for manufacturing semiconductor by using the same Download PDFInfo
- Publication number
- JP2004221294A JP2004221294A JP2003006563A JP2003006563A JP2004221294A JP 2004221294 A JP2004221294 A JP 2004221294A JP 2003006563 A JP2003006563 A JP 2003006563A JP 2003006563 A JP2003006563 A JP 2003006563A JP 2004221294 A JP2004221294 A JP 2004221294A
- Authority
- JP
- Japan
- Prior art keywords
- surface electrode
- pressing portion
- lead terminal
- semiconductor chip
- lead frame
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/74—Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies
- H01L24/77—Apparatus for connecting with strap connectors
-
- 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
- H01L2224/01—Means 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
- H01L2224/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
- H01L2224/36—Structure, shape, material or disposition of the strap connectors prior to the connecting process
- H01L2224/37—Structure, shape, material or disposition of the strap connectors prior to the connecting process of an individual strap connector
- H01L2224/37001—Core members of the connector
- H01L2224/37099—Material
- H01L2224/371—Material 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
- H01L2224/37138—Material 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
- H01L2224/37147—Copper [Cu] as principal constituent
-
- 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
- H01L2224/01—Means 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
- H01L2224/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
- H01L2224/36—Structure, shape, material or disposition of the strap connectors prior to the connecting process
- H01L2224/37—Structure, shape, material or disposition of the strap connectors prior to the connecting process of an individual strap connector
- H01L2224/3754—Coating
-
- 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
- H01L2224/01—Means 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
- H01L2224/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
- H01L2224/39—Structure, shape, material or disposition of the strap connectors after the connecting process
- H01L2224/40—Structure, shape, material or disposition of the strap connectors after the connecting process of an individual strap connector
-
- 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
- H01L2224/01—Means 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
- H01L2224/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
- H01L2224/39—Structure, shape, material or disposition of the strap connectors after the connecting process
- H01L2224/40—Structure, shape, material or disposition of the strap connectors after the connecting process of an individual strap connector
- H01L2224/401—Disposition
- H01L2224/40151—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
- H01L2224/40221—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
- H01L2224/40245—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
-
- 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
- H01L2224/01—Means 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
- H01L2224/34—Strap connectors, e.g. copper straps for grounding power devices; Manufacturing methods related thereto
- H01L2224/39—Structure, shape, material or disposition of the strap connectors after the connecting process
- H01L2224/40—Structure, shape, material or disposition of the strap connectors after the connecting process of an individual strap connector
- H01L2224/401—Disposition
- H01L2224/40151—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
- H01L2224/40221—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
- H01L2224/40245—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
- H01L2224/40247—Connecting the strap to a bond pad of the item
-
- 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
- H01L2224/74—Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies and for methods related thereto
- H01L2224/77—Apparatus for connecting with strap connectors
-
- 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
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/84—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a strap connector
-
- 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
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/84—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a strap connector
- H01L2224/842—Applying energy for connecting
- H01L2224/84201—Compression bonding
- H01L2224/84205—Ultrasonic bonding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01004—Beryllium [Be]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01005—Boron [B]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01006—Carbon [C]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01013—Aluminum [Al]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01029—Copper [Cu]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01033—Arsenic [As]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01079—Gold [Au]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01082—Lead [Pb]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/14—Integrated circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Wire Bonding (AREA)
Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、超音波接合装置の超音波接合具に係わり、特に、半導体チップの上面電極とリードフレームのリード端子とに跨って載置された板または帯状の接続導体を同時に接合させるのに好適な超音波接合具、および該超音波接合具を用いた半導体装置の製造方法に関するものである。
【0002】
【従来の技術】
従来、モータードライバ、音声増幅用パワーIC、情報機器のACアダプタ等に用いられる大電力用の半導体装置としては、細い金属線に替えて、半導体チップの上面電極とリードフレームのリード端子との接続に、帯状の接続導体を超音波接合してなるものがある(例えば、特許文献1参照。)。
【0003】
この特許文献1に開示された半導体装置では、図6に示すように、リードフレーム104のアイランド部104aに載置された半導体チップ101の上面電極102に帯状の接続導体103の一端部103aを重ね、押圧して超音波接合し、更にリードフレーム104のリード端子104bに接続導体103の他端部103bを重ね、押圧して超音波接合している。
【0004】
そして、この超音波接合には、一般に、押圧面が平坦な超音波接合具が用いられている。
【0005】
このため、接合部を個別に接合する従来の超音波接合装置では、冗長な加工時間を要し、半導体装置の製造コストの増大を招くなどの問題がある。
【0006】
更に、また、超音波接合具の押圧面が平坦であるため、接合部材が滑りやすく、超音波接合具の振動エネルギーの伝達ロスが生じて十分な接合強度が得られない問題がある。
【0007】
一方、従来の超音波接合装置の超音波ホーンには、電子部品が取り付けられる放熱プレートをフィンに接合するにあたり、超音波を印加した際に放熱プレートが滑らないように保持して十分な接合強度で放熱プレートをフィンに接合できるように、押圧部に突起が形成されているものがある(例えば、特許文献2参照。)。
【0008】
この特許文献2に開示された従来の超音波ホーンの構造について、図7を用いて説明する。図7(a)はその超音波ホーンの底面図、図7(b)は、図7(a)のE−E線に沿って切断し、矢印方向に眺めた断面図である。
【0009】
図に示すように、超音波ホーン(図示せず)の先端に、超音波接合具111が取り付けられている。超音波接合具111の底面には、電子部品(図示せず)が取り付けられる放熱プレート(図示せず)とフィン(図示せず)の接合部を押圧する押圧部112を有している。押圧部112の中央は平面部113になっているが、残りの外周部には、複数の略角錐台状の突起が形成されており、接合時に滑り止めとなるローレット114を構成している。
【0010】
この種の超音波接合装置では、超音波ホーンの押圧部は単一の平面形状をしているため上記特許文献1に開示された半導体装置のように、半導体チップの上面電極の上面とリードフレームのリード端子上面のステージブロックからの距離、すなわち高さが異なる場合、接続導体を同時に接合することはできず、上述した超音波接合工程を別々に行わなければならない。
【0011】
更に、また、半導体チップの上面電極とリードフレームのリード端子の材質が異なる場合、超音波接合条件が違うため、接続導体を同時に接合することはできず、上述した超音波接合工程を別々に行わなければならない。
【0012】
【特許文献1】
特開2001−274206号公報(第2−3頁、図1)
【0013】
【特許文献2】
特開2001−334372号公報(第3頁、図4)
【0014】
【発明が解決しようとする課題】
上述した特許文献1および特許文献2に開示された超音波接合装置の超音波ホーンにおいては、接合部の高さが異なる複数の接続体、または接合部の材質が異なる複数の接続体を、同時にしかも十分な強度で接合できないという問題点がある。
【0015】
本発明の目的は、半導体チップの上面電極の平面とその平面が異なる位置にあるリードフレームのリード端子とに接続導体を同時にしかも十分な接合強度で接合するのに好適な超音波接合具を提供することにある。
【0016】
また、本発明の別の目的は、半導体チップの上面電極の材質と異なる材質のリードフレームのリード端子とに接続導体を同時にしかも十分な接合強度で接合するのに好適な超音波接合具を提供することにある。
【0017】
更に、本発明の別の目的は、半導体チップの上面電極の平面とその平面が異なる位置にあるリードフレームのリード端子に接続導体を同時にしかも十分な強度で接合してなる半導体装置の製造方法を提供することにある。
【0018】
更に、また、本発明の別の目的は、半導体チップの上面電極とこの上面電極の材質と異なる材質からなるリードフレームのリード端子に接続導体を同時にしかも十分な強度で接合してなる半導体装置の製造方法を提供することにある。
【0019】
【課題を解決するための手段】
上記目的を達成するために、本発明の超音波接合具では、半導体チップの上面電極とこの上面電極の平面と異なる平面に位置するリードフレームのリード端子とに跨って載置された板または帯状の接続導体を前記上面電極とリード端子に対して同時に超音波接合する超音波接合具であって、前記半導体チップの上面電極と前記接続導体との接合部を押圧する第1押圧部と、前記第1押圧部と異なる平面に位置し、且つ前記リードフレームのリード端子と前記接続導体との接合部を押圧する第2押圧部と、前記第1および第2押圧部に形成された複数の突起とを有することを特徴としている。
【0020】
本発明によれば、超音波ホーンの先端に取り付けられた超音波接合具に、複数の接合部の高さの差に倣った段差を有する複数の押圧部を設け、更にその押圧部に突起を形成しているので、同時に各接合部が確実に押圧されて超音波が伝播し、安定して十分な接合強度が得られる。
【0021】
また、上記別の目的を達成するために、本発明の超音波接合具では、半導体チップの上面電極とこの上面電極の材質と異なる材質からなるリードフレームのリード端子とに跨って載置された板または帯状の接続導体を前記上面電極とリード端子に対して同時に超音波接合する超音波接合具であって、前記半導体チップの上面電極と前記接続導体との接合部を押圧する第1押圧部と、前記リードフレームのリード端子と前記接続導体との接合部を押圧し、且つ前記第1押圧部と異なる押圧力を生じせしめる第2押圧部と、前記第1および第2押圧部に形成された複数の突起とを有することを特徴としている。
【0022】
本発明によれば、超音波ホーンの先端に取り付けられた超音波接合具に、複数の接合部の材質の違いに応じて、押圧力を異ならしめ、更に各押圧部に突起を形成しているので、同時に各接合部が確実に押圧されて超音波が伝播し、安定して十分な接合強度が得られる。
【0023】
更に、上記別の目的を達成するために、本発明の半導体装置の製造方法では、上述の本発明に係わる超音波接合具を用いて、半導体チップの上面電極とこの上面電極の平面と異なる平面に位置するリードフレームのリード端子とに跨って載置された板または帯状の接続導体を前記上面電極とリード端子に対して十分な接合強度で超音波接合することを特徴としている。
【0024】
本発明によれば、半導体チップの上面電極の平面とその平面が異なる位置にあるリードフレームのリード端子とに接続導体を同時にしかも十分な強度で接合してなる半導体装置が得られる。
【0025】
更に、また、上記別の目的を達成するために、本発明の半導体装置の製造方法では、上述の本発明に係わる超音波接合具を用いて、半導体チップの上面電極の材質と異なる材質のリードフレームのリード端子とに跨って載置された板または帯状の接続導体を前記上面電極とリード端子に対して同時に十分な接合強度で超音波接合することを特徴としている。
【0026】
本発明によれば、半導体チップの上面電極の材質と異なる材質のリードフレームのリード端子とに接続導体を同時にしかも十分な強度で接合してなる半導体装置が得られる。
【0027】
【発明の実施の形態】
以下本発明の実施の形態について、図面を参照しながら説明する。
【0028】
(第1の実施の形態)
図1は、本発明の第1の実施の形態に係わる超音波接合具を示す図で、図1(a)はその超音波接合具の底面図、図1(b)はこの超音波接合具を用いて半導体チップの上面電極とリードフレームのリード端子を板または帯状の接続導体にて接続する状態を示す断面図で、図1(a)の超音波接合具をA−A線に沿って切断し、図示の矢印方向から眺めたものである。
【0029】
本実施の形態の超音波接合具は、図4に示すような、リードフレーム11のアイランド部11aに載置された半導体チップ13の上面電極14とこの上面電極14の平面と異なる平面に位置するリードフレーム11のリード端子11bとに跨って板または帯状の接続導体12が設けられてなる半導体装置において、上面部電極14およびリードフレーム11のリード端子11bに接続導体12の一端部12aおよび他端部12bを同時に超音波接合する場合の例である。
【0030】
図1に示すように、超音波ホーン(図示せず)の先端に取り付けられる本実施の形態の超音波接合具20では、その底面は、接続導体12の一端部12aと半導体チップ13の上面電極14との接合部を押圧する第1押圧部21と、接続導体12の他端部12bとリードフレーム11のリード端子11bとの接合部を押圧する第2押圧部22とを有している。
【0031】
そして、第2押圧部22には、胴体部23との間に半導体チップ13の上面電極14の平面とリードフレーム11のリード端子11bの平面との距離、すなわち高さの差(Δh)に相当する台座部24が挿入されている。この台座部24は、胴体部23を加工して、胴体部23と一体に形成してもよく、または胴体部23と別個に予め形成されたものを胴体部23に固着しても構わない。
【0032】
さらに、第1押圧部21および第2押圧部22には、それぞれ同じ大きさの複数の四角錘台状突起25および26が格子状に形成され、接合部の面積の大きい第1押圧部21に、より多くの突起25が設けられている。
【0033】
次に、本実施の形態の超音波接合具20を用いて、接続導体12を半導体チップ13の上面電極14とリードフレーム11のリード端子11bに超音波接合する場合について、図1を参照して説明する。
【0034】
まず、アイランド部11aに半導体チップ13が載置されたリードフレーム11を超音波接合装置のステージブロック31にセットし、半導体チップ13のアルミニウム材からなる上面電極14、および、例えば、ニッケルメッキされた銅からなるリードフレーム11のリード端子11bに跨ってアルミニウム材からなる板または帯状の接続導体12を載置し、接続導体12の一端部12aを上面電極14に重ね、また他端部12bをリード端子11bに重ねる。
【0035】
そして、超音波接合具20を降下させ、接続導体12の一端部12aを第1押圧部21により上面電極14に、また接続導体12の他端部12bを第2押圧部22によりリードフレーム11のリード端子11bに同時に押圧する。続いて、接続導体12の一端部12aおよび他端部12bに水平方向の超音波を印加することで、半導体チップ13の上面電極14およびリード端子11bと接続導体12の一端部12aおよび他端部12bが同時に超音波接合される。
【0036】
すなわち、第1押圧部21の突起25、および第2押圧部22の突起26が接続導体12の一端部12aおよび他端部12bのそれぞれに食い込むことにより、各接合部の高さに微妙な寸法誤差があっても、各接合部が同時に押圧されて、超音波が確実に各接合部に伝播するので、十分な接合強度で接合される。
【0037】
なお、この明細書で言うアルミニウム材とは、アルミニウムまたはアルミニウム合金からなるものを言う。
【0038】
以上説明したように、上記第1の実施の形態によれば、超音波接合具に複数の接合部の高さの差に倣った段差を有する複数の押圧部を設け、その押圧部に突起を形成して突起が接続導体に食い込むようにしたので、各接合部の高さに微妙な寸法誤差があっても各接合部が確実に押圧されて超音波が伝播する。
【0039】
更に、単位面積当たりの突起の数が等しくなるように各接続部の突起の数を変えたので、各接合部に単位面積当たり等しい押圧力が印加されて、安定して十分な接合強度が得られる。これにより、接合に要する加工時間が短縮され、半導体装置における製造コストが低減できる利点がある。
【0040】
(第2の実施の形態)
図2は、本発明の第2の実施の形態に係わる超音波接合具を示す図で、図2(a)はその超音波接合具の底面図、図2(b)は半導体チップの上面電極とリードフレームのリード端子を板または帯状の接続導体にて接続する状態を示す断面図で、図2(a)の超音波接合具をB−B線に沿って切断し、図示の矢印方向から眺めたものである。本実施の形態において、上記第1の実施の形態と同一の構成部分には、同一符号を付して、その説明を省略する。
【0041】
本実施の形態の超音波接合具は、図4に示すような半導体装置において、半導体チップ13の上面電極14とリードフレーム11のリード端子11bの高さがほぼ等しく、半導体チップ13の上面電極14とその材質と異なる材質のリードフレーム11のリード端子11bとに跨って板または帯状の接続導体12を載置し、上面電極14およびリードフレーム11のリード端子11bに接続導体12の一端部12aおよび他端部12bを同時に超音波接合する場合の例である。
【0042】
まず、図2に示すように、第2の実施の形態の超音波接合具40が、第1の実施の形態と異なる点は、接合部の材質に応じて、第1押圧部41に設けられた四角錐台状突起45の先端部の面積と、第2押圧部42に設けられた四角錐台状突起46の先端部の面積とに差を設けたことにある。
【0043】
例えば、上面電極14が金電極であり、リードフレーム11のリード端子11bが鉄と銅の合金(主成分は鉄)からなり、その材質(硬さ)に大きな差がある場合には、突起46の先端部の面積を突起45の先端部の面積より小さくして、リードフレーム11のリード端子11bに加わる単位面積当たりの押圧力を上面電極14に加わる単位面積当たりの押圧力より高くすることができる。
【0044】
実験によれば、アルミニウムと金、銅、鉄の超音波接合のし易さは、同じ超音波接合条件では金が最も容易で、以下銅、鉄の順であり、アルミニウムと鉄の超音波接合では、単位面積当たりの押圧力は高い方が良好であった。これは、超音波接合では、接合界面の酸化膜を壊して新生面同士を金属結合させているが、酸化膜が実質的に存在しない金に比べて酸化膜が強固な材質の材料ほど酸化膜を壊すためのエネルギーが必要なためと推定される。
【0045】
これにより、第1押圧部41と第2押圧部42に設けられた突起45、46により、同時に、接続導体12の一端部12aと上面電極14との接合部および接続導体12の他端部12bとの接合部を確実に押圧するとともに、接続導体12の一端部12aおよび他端部12bへの押圧力を変えて、超音波の振動エネルギーの伝達量を材質毎に適した条件に合わせることにより、十分な接合強度で接合される。
【0046】
尚、ここでは、上面電極14の平面とリードフレーム11のリード端子11bの平面の高さがほぼ等しいため、胴体部43には台座部を設けず、第1押圧部41と第2押圧部42の平面は、同一平面をなしている。
【0047】
以上説明したように、上記第2の実施の形態によれば、各接合部の材質の差に応じて突起の先端部の面積を変えたので、材質によらず同時に各接合部が確実に押圧されて超音波が伝播し、安定して十分な接合強度が得られる。これにより、接合に要する加工時間が短縮され、半導体装置における製造コストが低減できる利点がある。
【0048】
(第3の実施の形態)
図3は、本発明の第3の実施の形態に係わる超音波接合具を示す図で、図3(a)はその超音波接合具の底面図、図3(b)は半導体チップの上面電極とリードフレームのリード端子を板または帯状の接続導体にて接続する状態を示す断面図で、図3(a)の超音波接合具をC−C線に沿って切断し、図示の矢印方向から眺めたものである。本実施の形態において、上記第1の実施の形態と同一の構成部分には、同一符号を付して、その説明を省略する。
【0049】
本実施の形態の超音波接合具は、図4に示すような、半導体チップ13の上部電極14の平面と異なる平面を有し、且つ半導体チップ13の上面電極14の材質と異なる材質からなるリードフレーム11のリード端子11bとに跨って板または帯状の接続導体12が設けられてなる半導体装置において、上部電極14およびリードフレーム11のリード端子11bに接続導体12の一端部12aおよび他端部12bを同時に超音波接合する場合の例である。
【0050】
本実施の形態の超音波接合具50は、図3に示すように、第1の実施の形態と第2の実施の形態を合わせた構造となっている。
【0051】
すなわち、第1押圧部51と第2押圧部52とは、半導体チップ13の上面電極14の平面とリードフレーム11のリード端子11bの平面との距離、すなわち高さの差(Δh)とに相当する段差を有している。この段差は、第2押圧部52と胴体部53との間に台座部54を挿入することにより形成されている。
【0052】
そして、第2押圧部52に設けた四角錐台状の突起56の先端部の面積を、第1押圧部51に設けた四角錐台状の突起55の先端部の面積より小さく形成している。
【0053】
然るに、第1押圧部51と第2押圧部52に設けられた突起55、56により、同時に、接続導体12の一端部12aと上面電極14との接合部および接続導体12の他端部12bとの接合部を確実に押圧するとともに、接続導体12の一端部12aおよびの他端部12bへの押圧力を変えて、超音波の指導エネルギーの伝達量を材質毎に適した条件にあわせることにより、十分な接合強度で接合される。
【0054】
以上説明したように、上記第3の実施の形態によれば、同時に各接合部が確実に押圧されて超音波が伝播し、安定して十分な接合強度が得られる。これにより、接合に要する加工時間が短縮され、半導体装置における製造コストが低減できる利点がある。
【0055】
上述の実施の形態では、第1および第2押圧部に形成された突起が四角錘台形状突起の場合について説明したが、本発明は、これに限定されるものではなく、さらに多角錐台形状突起、円錐台形状突起、または半球状突起としても構わない。
【0056】
また、上述の第1および第3の実施の形態では、リードフレームのリード端子の平面が上面電極の平面より低い場合について説明したが、本発明は、これに限定されるものではなく、反対にリード端子の平面が高い場合についても同様に適用できる。
【0057】
更に、リードフレームのリード端子や上面電極の材質もこれに限定されるものではなく、種々変更して適用することができる。
【0058】
次に、本発明の超音波接合具を用いた半導体装置の製造方法の実施の形態について、図面を参照しながら説明する。
【0059】
図4は、本発明の第1の実施の形態に係わる超音波接合具を用いた半導体装置の製造工程を示す断面図で、図4(a)は組立て部品を示す断面図、図4(b)は超音波接合工程を示す断面図、図4(c)はモールドされた半導体装置を示す断面図である。
【0060】
始めに、リードフレーム11、接続導体12および半導体チップ13が用意され、超音波接合装置のチップマウンター部(図示せず)の収納部にそれぞれセットされる。
【0061】
次に、アイランド部11aに半導体チップ13が、例えば導電性ペーストを介して固着された後、接続導体12がリードフレーム11および半導体チップ13上に載置されて接続導体の一端部12aと半導体チップの上面電極14および接続導体の他端部12bとリードフレームのリード端子11bが重ね合わされる。
【0062】
次に、リードフレーム11が超音波接合部のステージブロック31に移載され、第1の実施の形態に係わる超音波接合具を用いて超音波接合が行われる。即ち、超音波接合具20の第1押圧部21により接続導体の一端部12aと上面電極14を、第2押圧部22により接続導体の他端部12bとリード端子11bを同時に押圧して、超音波を印加することにより接続導体12がリードフレームのリード端子11bと上面電極14に十分な強度で接合される。
【0063】
次に、リードフレーム11をモールド装置(図示せず)に移送して樹脂15でモールドすることにより半導体装置が完成する。
【0064】
以上説明したように、本発明の実施の形態による半導体装置の製造方法によれば、半導体チップの上面電極の平面とその平面が異なる位置にあるリードフレームのリード端子とに接続導体を同時にしかも十分な強度で接合してなる半導体装置が得られる。
【0065】
図5は、本発明の第2の実施の形態に係わる超音波接合具を用いた半導体装置の製造工程を示す断面図で、図5(a)は組立て部品を示す断面図、図5(b)は超音波接合工程を示す断面図、図5(c)はモールドされた半導体装置を示す断面図である。
【0066】
図に示すように、本実施の形態は、第2の実施の形態に係わる超音波接合具を用いる点を除いて上記第1の実施の形態に係わる超音波接合具を用いた半導体装置の製造工程と同一であり、同一構成部分には同一符号を付してその説明は省略する。
【0067】
以上説明したように、本発明の第2の実施の形態による半導体装置の製造方法によれば、半導体チップの上面電極の材質と異なる材質のリードフレームのリード端子とに接続導体を同時にしかも十分な強度で接合してなる半導体装置が得られる。
【0068】
【発明の効果】
以上説明したように、本発明によれば、半導体チップの上面電極リードフレームのリード端子に跨って載置された接続導体を同時にしかも十分な強度で接合することができる。
【0069】
従って、接続に要する加工時間が短縮され、半導体装置における製造コストが低減できる。
【図面の簡単な説明】
【図1】本発明の第1の実施の形態に係わる超音波接合具を示す図で、図1(a)は超音波接合具の底面図、図1(b)は、半導体チップの上面電極とリードフレームのリード端子を接続導体にて超音波接合する状態を示す図で、図1(a)のA−A線に沿う断面図。
【図2】本発明の第2の実施の形態に係わる超音波接合具を示す図で、図2(a)は超音波接合具の底面図、図2(b)は、半導体チップの上面電極とリードフレームのリード端子を接続導体にて超音波接合する状態を示す図で、図2(a)のB−B線に沿う断面図。
【図3】本発明の第3の実施の形態に係わる超音波接合具を示す図で、図3(a)は超音波接合具の底面図、図3(b)は、半導体チップの上面電極とリードフレームのリード端子を接続導体にて超音波接合する状態を示す図で、図3(a)のC−C線に沿う断面図。
【図4】本発明の第1の実施の形態に係わる半導体装置の製造工程を示す断面図で、図4(a)は組立て部品を示す断面図、図4(b)は超音波接合工程を示す断面図、図4(c)はモールドされた半導体装置を示す断面図。
【図5】本発明の第2の実施の形態に係わる半導体装置の製造工程を示す断面図で、図5(a)は組立て部品を示す断面図、図5(b)は超音波接合工程を示す断面図、図5(c)はモールドされた半導体装置を示す断面図である。
【図6】従来の半導体装置を示す断面図。
【図7】従来の超音波接合具を示す図で、図7(a)は超音波接合具の底面図、図7(b)は、図7(a)のE−E線に沿う断面図。
【符号の説明】
11、104 リードフレーム
11a、104a アイランド部
11b、104b リード端子
12、103 接続導体
12a、103a 接続導体の一端部
12b、103b 接続導体の他端部
13、101 半導体チップ
14、102 上面電極
15 樹脂
20、40、50、111 超音波接合具
21、41、51 第1押圧部
22、42、52 第2押圧部
23、43、53 胴体部
24、54 台座部
25、26、45、46、55、56 突起
31 ステージブロック
112 押圧部
113 平面部
114 ローレット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ultrasonic bonding tool of an ultrasonic bonding apparatus, and is particularly suitable for simultaneously bonding a plate or a strip-shaped connection conductor placed across an upper surface electrode of a semiconductor chip and a lead terminal of a lead frame. The present invention relates to an ultrasonic bonding tool and a method for manufacturing a semiconductor device using the ultrasonic bonding tool.
[0002]
[Prior art]
Conventionally, as a high-power semiconductor device used for motor drivers, power ICs for audio amplification, AC adapters for information devices, etc., instead of thin metal wires, the connection between the top electrode of the semiconductor chip and the lead terminal of the lead frame In addition, there is one obtained by ultrasonically bonding a strip-shaped connection conductor (see, for example, Patent Document 1).
[0003]
In the semiconductor device disclosed in
[0004]
For this ultrasonic bonding, generally, an ultrasonic bonding tool having a flat pressing surface is used.
[0005]
For this reason, in the conventional ultrasonic bonding apparatus which joins a junction part separately, redundant processing time is required and there exists a problem of causing the increase in the manufacturing cost of a semiconductor device.
[0006]
Furthermore, since the pressing surface of the ultrasonic bonding tool is flat, there is a problem that the bonding member is slippery, and transmission loss of vibration energy of the ultrasonic bonding tool is generated and sufficient bonding strength cannot be obtained.
[0007]
On the other hand, the ultrasonic horn of the conventional ultrasonic bonding apparatus has a sufficient bonding strength by holding the heat radiating plate so that it does not slip when ultrasonic waves are applied when bonding the heat radiating plate to which electronic components are attached to the fin. In some cases, a protrusion is formed on the pressing portion so that the heat dissipation plate can be joined to the fin (see, for example, Patent Document 2).
[0008]
The structure of the conventional ultrasonic horn disclosed in Patent Document 2 will be described with reference to FIG. 7A is a bottom view of the ultrasonic horn, and FIG. 7B is a cross-sectional view taken along the line EE of FIG. 7A and viewed in the direction of the arrow.
[0009]
As shown in the figure, an
[0010]
In this type of ultrasonic bonding apparatus, since the pressing portion of the ultrasonic horn has a single planar shape, the upper surface of the upper electrode of the semiconductor chip and the lead frame, as in the semiconductor device disclosed in
[0011]
Furthermore, when the materials of the upper electrode of the semiconductor chip and the lead terminal of the lead frame are different, the ultrasonic bonding conditions are different, so the connecting conductors cannot be bonded simultaneously, and the ultrasonic bonding process described above is performed separately. There must be.
[0012]
[Patent Document 1]
JP 2001-274206 A (page 2-3, FIG. 1)
[0013]
[Patent Document 2]
JP 2001-334372 A (page 3, FIG. 4)
[0014]
[Problems to be solved by the invention]
In the ultrasonic horn of the ultrasonic bonding apparatus disclosed in
[0015]
An object of the present invention is to provide an ultrasonic bonding tool suitable for bonding a connecting conductor to a lead terminal of a lead frame at a position different from the plane of the upper surface electrode of the semiconductor chip at the same time with sufficient bonding strength. There is to do.
[0016]
Another object of the present invention is to provide an ultrasonic connector suitable for bonding a connection conductor to a lead terminal of a lead frame made of a material different from the material of the upper surface electrode of the semiconductor chip at the same time with sufficient bonding strength. There is to do.
[0017]
Furthermore, another object of the present invention is to provide a method of manufacturing a semiconductor device in which a connection conductor is simultaneously bonded with sufficient strength to lead terminals of a lead frame in which the plane of the upper surface electrode of the semiconductor chip is different from the plane. It is to provide.
[0018]
Furthermore, another object of the present invention is to provide a semiconductor device in which a connection conductor is simultaneously bonded to a lead terminal of a lead frame made of a material different from the material of the upper surface electrode of the semiconductor chip and the upper surface electrode with sufficient strength. It is to provide a manufacturing method.
[0019]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, in the ultrasonic bonding tool of the present invention, a plate or a belt-like shape placed across the upper surface electrode of the semiconductor chip and the lead terminal of the lead frame located on a plane different from the plane of the upper surface electrode. An ultrasonic bonding tool for simultaneously ultrasonically bonding the connection conductor to the upper surface electrode and the lead terminal, wherein the first pressing portion presses the bonding portion between the upper surface electrode of the semiconductor chip and the connection conductor; A second pressing portion that is located on a different plane from the first pressing portion and that presses the joint between the lead terminal of the lead frame and the connecting conductor; and a plurality of protrusions formed on the first and second pressing portions It is characterized by having.
[0020]
According to the present invention, the ultrasonic connector attached to the tip of the ultrasonic horn is provided with a plurality of pressing portions having steps following the difference in height of the plurality of connecting portions, and a protrusion is formed on the pressing portion. Since they are formed, each joint is reliably pressed at the same time so that the ultrasonic wave propagates, and a sufficient joint strength can be obtained stably.
[0021]
In order to achieve the above-described another object, in the ultrasonic bonding tool of the present invention, the ultrasonic bonding tool is placed across the upper surface electrode of the semiconductor chip and the lead terminal of the lead frame made of a material different from the material of the upper surface electrode. An ultrasonic bonding tool for simultaneously ultrasonically bonding a plate or strip-shaped connection conductor to the upper surface electrode and the lead terminal, wherein the first pressing portion presses the bonding portion between the upper surface electrode of the semiconductor chip and the connection conductor. And a second pressing portion that presses a joint portion between the lead terminal of the lead frame and the connection conductor and generates a pressing force different from that of the first pressing portion, and the first and second pressing portions. And a plurality of protrusions.
[0022]
According to the present invention, the ultrasonic bonding tool attached to the tip of the ultrasonic horn is made to have different pressing force according to the difference in material of the plurality of bonding portions, and further, a protrusion is formed on each pressing portion. Therefore, at the same time, each joint is reliably pressed and the ultrasonic wave propagates, and a sufficient joint strength can be obtained stably.
[0023]
Furthermore, in order to achieve the another object, in the method for manufacturing a semiconductor device of the present invention, the ultrasonic bonding tool according to the present invention is used, and the upper surface electrode of the semiconductor chip and a plane different from the plane of the upper surface electrode are used. A plate or a strip-shaped connecting conductor placed across the lead terminal of the lead frame located at the position is ultrasonically bonded to the upper surface electrode and the lead terminal with sufficient bonding strength.
[0024]
According to the present invention, it is possible to obtain a semiconductor device in which a connection conductor is simultaneously bonded with sufficient strength to a plane of an upper surface electrode of a semiconductor chip and a lead terminal of a lead frame at a position where the plane is different.
[0025]
Furthermore, in order to achieve the another object, in the method of manufacturing a semiconductor device of the present invention, the lead having a material different from the material of the upper surface electrode of the semiconductor chip is used by using the ultrasonic bonding tool according to the present invention. A plate or a strip-shaped connection conductor placed across the lead terminals of the frame is ultrasonically bonded to the upper surface electrode and the lead terminals simultaneously with sufficient bonding strength.
[0026]
According to the present invention, it is possible to obtain a semiconductor device in which a connection conductor is bonded to a lead frame lead terminal made of a material different from the material of the upper surface electrode of the semiconductor chip at the same time and with sufficient strength.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0028]
(First embodiment)
FIG. 1 is a view showing an ultrasonic connector according to the first embodiment of the present invention, FIG. 1 (a) is a bottom view of the ultrasonic connector, and FIG. 1 (b) is the ultrasonic connector. 1 is a cross-sectional view showing a state in which a top electrode of a semiconductor chip and a lead terminal of a lead frame are connected to each other by a plate or a strip-like connecting conductor, using the ultrasonic bonding tool of FIG. It is cut and viewed from the direction of the arrow shown.
[0029]
The ultrasonic bonding tool of the present embodiment is located on a plane different from the plane of the
[0030]
As shown in FIG. 1, in the
[0031]
The second
[0032]
Further, the first pressing
[0033]
Next, referring to FIG. 1, a case where the
[0034]
First, the
[0035]
Then, the
[0036]
That is, the
[0037]
In addition, the aluminum material said in this specification means what consists of aluminum or an aluminum alloy.
[0038]
As described above, according to the first embodiment, the ultrasonic bonding tool is provided with a plurality of pressing portions having steps following the difference in height of the plurality of bonding portions, and protrusions are provided on the pressing portions. Since the protrusion is formed so as to bite into the connection conductor, even if there is a slight dimensional error in the height of each joint, each joint is reliably pressed and ultrasonic waves propagate.
[0039]
In addition, since the number of protrusions in each connecting portion is changed so that the number of protrusions per unit area is equal, an equal pressing force per unit area is applied to each joint portion, and stable and sufficient joint strength is obtained. It is done. Thereby, there is an advantage that the processing time required for bonding is shortened and the manufacturing cost of the semiconductor device can be reduced.
[0040]
(Second Embodiment)
2A and 2B are diagrams showing an ultrasonic bonding tool according to a second embodiment of the present invention. FIG. 2A is a bottom view of the ultrasonic bonding tool, and FIG. 2B is an upper surface electrode of a semiconductor chip. FIG. 2 is a cross-sectional view showing a state in which the lead terminals of the lead frame are connected to each other by a plate or a strip-like connection conductor, and the ultrasonic bonding tool of FIG. It is what I saw. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0041]
In the ultrasonic bonding apparatus of the present embodiment, in the semiconductor device as shown in FIG. 4, the height of the
[0042]
First, as shown in FIG. 2, the
[0043]
For example, when the
[0044]
According to experiments, the ease of ultrasonic bonding of aluminum and gold, copper and iron is the easiest for gold under the same ultrasonic bonding conditions, followed by copper and iron, followed by ultrasonic bonding of aluminum and iron. Then, the higher the pressing force per unit area, the better. This is because in ultrasonic bonding, the oxide film at the bonding interface is broken and the new surfaces are metal-bonded to each other. It is estimated that energy is required to break.
[0045]
As a result, the
[0046]
Here, since the height of the plane of the
[0047]
As described above, according to the second embodiment, the area of the tip of the protrusion is changed according to the difference in the material of each joint, so that each joint can be reliably pressed simultaneously regardless of the material. Then, the ultrasonic wave propagates and a sufficient bonding strength can be obtained stably. Thereby, there is an advantage that the processing time required for bonding is shortened and the manufacturing cost of the semiconductor device can be reduced.
[0048]
(Third embodiment)
3A and 3B are views showing an ultrasonic bonding tool according to a third embodiment of the present invention. FIG. 3A is a bottom view of the ultrasonic bonding tool, and FIG. 3B is an upper surface electrode of a semiconductor chip. 3 is a cross-sectional view showing a state in which the lead terminals of the lead frame are connected to each other by a plate or a strip-like connection conductor, and the ultrasonic bonding tool of FIG. It is what I saw. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0049]
The ultrasonic bonding tool of the present embodiment has a plane different from the plane of the
[0050]
As shown in FIG. 3, the
[0051]
That is, the first pressing
[0052]
The area of the tip portion of the quadrangular frustum-shaped
[0053]
However, the
[0054]
As described above, according to the third embodiment, the joints are simultaneously pressed at the same time and the ultrasonic waves are propagated, so that sufficient joint strength can be obtained stably. Thereby, there is an advantage that the processing time required for bonding is shortened and the manufacturing cost of the semiconductor device can be reduced.
[0055]
In the above-described embodiment, the case where the protrusions formed on the first and second pressing portions are quadrangular frustum-shaped protrusions has been described. However, the present invention is not limited to this, and the polygonal frustum shape is further limited. A projection, a truncated cone-shaped projection, or a hemispherical projection may be used.
[0056]
In the first and third embodiments described above, the case where the plane of the lead terminal of the lead frame is lower than the plane of the upper surface electrode has been described, but the present invention is not limited to this, and conversely The same applies to the case where the lead terminal has a high flat surface.
[0057]
Further, the material of the lead terminal of the lead frame and the upper surface electrode is not limited to this, and various changes can be applied.
[0058]
Next, an embodiment of a method of manufacturing a semiconductor device using the ultrasonic bonding tool of the present invention will be described with reference to the drawings.
[0059]
4A and 4B are cross-sectional views showing a manufacturing process of the semiconductor device using the ultrasonic bonding tool according to the first embodiment of the present invention. FIG. 4A is a cross-sectional view showing the assembly parts, and FIG. ) Is a sectional view showing an ultrasonic bonding step, and FIG. 4C is a sectional view showing a molded semiconductor device.
[0060]
First, the
[0061]
Next, after the
[0062]
Next, the
[0063]
Next, the
[0064]
As described above, according to the method of manufacturing a semiconductor device according to the embodiment of the present invention, the connection conductors can be provided at the same time to the plane of the upper surface electrode of the semiconductor chip and the lead terminal of the lead frame at a different plane. A semiconductor device formed by bonding with a sufficient strength can be obtained.
[0065]
FIG. 5 is a cross-sectional view showing a manufacturing process of a semiconductor device using an ultrasonic connector according to the second embodiment of the present invention. FIG. 5 (a) is a cross-sectional view showing assembled parts, and FIG. ) Is a sectional view showing an ultrasonic bonding step, and FIG. 5C is a sectional view showing a molded semiconductor device.
[0066]
As shown in the drawing, the present embodiment is a method for manufacturing a semiconductor device using the ultrasonic bonding tool according to the first embodiment except that the ultrasonic bonding tool according to the second embodiment is used. The same reference numerals are given to the same components, and the description thereof is omitted.
[0067]
As described above, according to the manufacturing method of the semiconductor device according to the second embodiment of the present invention, the connection conductor is provided at the same time with the lead terminal of the lead frame made of a material different from the material of the upper surface electrode of the semiconductor chip. A semiconductor device formed by bonding with strength is obtained.
[0068]
【The invention's effect】
As described above, according to the present invention, the connection conductors placed across the lead terminals of the upper surface electrode lead frame of the semiconductor chip can be joined simultaneously and with sufficient strength.
[0069]
Therefore, the processing time required for connection is shortened, and the manufacturing cost of the semiconductor device can be reduced.
[Brief description of the drawings]
1A and 1B are diagrams showing an ultrasonic bonding tool according to a first embodiment of the present invention. FIG. 1A is a bottom view of the ultrasonic bonding tool, and FIG. 1B is an upper surface electrode of a semiconductor chip. FIG. 2 is a diagram showing a state in which the lead terminals of the lead frame are ultrasonically bonded with a connecting conductor, and is a cross-sectional view taken along the line AA in FIG.
2A and 2B are diagrams showing an ultrasonic bonding tool according to a second embodiment of the present invention, in which FIG. 2A is a bottom view of the ultrasonic bonding tool, and FIG. 2B is an upper surface electrode of a semiconductor chip; FIG. 3 is a diagram showing a state in which the lead terminals of the lead frame are ultrasonically bonded by a connecting conductor, and is a cross-sectional view taken along line BB in FIG.
3A and 3B are diagrams showing an ultrasonic bonding tool according to a third embodiment of the present invention, in which FIG. 3A is a bottom view of the ultrasonic bonding tool, and FIG. 3B is an upper surface electrode of a semiconductor chip; FIG. 4 is a diagram showing a state in which the lead terminals of the lead frame are ultrasonically bonded by a connecting conductor, and is a cross-sectional view taken along the line CC in FIG.
4A and 4B are cross-sectional views showing a manufacturing process of the semiconductor device according to the first embodiment of the present invention. FIG. 4A is a cross-sectional view showing assembled parts, and FIG. 4B is an ultrasonic bonding process. FIG. 4C is a cross-sectional view showing a molded semiconductor device.
5A and 5B are cross-sectional views showing a manufacturing process of a semiconductor device according to a second embodiment of the present invention. FIG. 5A is a cross-sectional view showing an assembly part, and FIG. 5B is an ultrasonic bonding process. FIG. 5C is a sectional view showing a molded semiconductor device.
FIG. 6 is a cross-sectional view showing a conventional semiconductor device.
7A and 7B are diagrams showing a conventional ultrasonic connector, where FIG. 7A is a bottom view of the ultrasonic connector, and FIG. 7B is a cross-sectional view taken along line EE of FIG. 7A. .
[Explanation of symbols]
DESCRIPTION OF
Claims (12)
前記半導体チップの上面電極と前記接続導体との接合部を押圧する第1押圧部と、
前記第1押圧部と異なる平面に位置し、且つ前記リードフレームのリード端子と前記接続導体との接合部を押圧する第2押圧部と、
前記第1および第2押圧部に形成された複数の突起と、
を有することを特徴とする超音波接合具。A plate or strip-shaped connecting conductor placed across the upper surface electrode of the semiconductor chip and the lead terminal of the lead frame located on a plane different from the plane of the upper surface electrode is simultaneously ultrasonically bonded to the upper surface electrode and the lead terminal. An ultrasonic bonding tool that
A first pressing portion that presses a joint between the upper surface electrode of the semiconductor chip and the connection conductor;
A second pressing part that is located on a different plane from the first pressing part and that presses the joint between the lead terminal of the lead frame and the connection conductor;
A plurality of protrusions formed on the first and second pressing portions;
An ultrasonic connector characterized by comprising:
前記半導体チップの上面電極と前記接続導体との接合部を押圧する第1押圧部と、
前記リードフレームのリード端子と前記接続導体との接合部を押圧し、且つ前記第1押圧部と異なる押圧力を生じせしめる第2押圧部と、
前記第1および第2押圧部に形成された複数の突起と、
を有することを特徴とする超音波接合具。A plate or a strip-shaped connecting conductor placed across the upper surface electrode of the semiconductor chip and the lead terminal of the lead frame made of a material different from the material of the upper surface electrode is simultaneously ultrasonically bonded to the upper surface electrode and the lead terminal. An ultrasonic connector,
A first pressing portion that presses a joint between the upper surface electrode of the semiconductor chip and the connection conductor;
A second pressing portion that presses a joint portion between the lead terminal of the lead frame and the connection conductor and generates a pressing force different from that of the first pressing portion;
A plurality of protrusions formed on the first and second pressing portions;
An ultrasonic connector characterized by comprising:
前記半導体チップの上面電極と接続導体との接合部を押圧する第1押圧部と、前記第1押圧部と異なる平面に位置し、且つ前記リードフレームのリード端子と前記接続導体との接合部を押圧する第2押圧部と、前記第1および第2押圧部に形成された複数の突起とを有する超音波接合具を用いて、
前記半導体チップの上面電極とこの上面電極の平面と異なる平面に位置する前記リードフレームのリード端子とに跨って載置された板または帯状の前記接続導体を前記上面電極と前記リード端子に対して同時に超音波接合することを特徴とする半導体装置の製造方法。A method of manufacturing a semiconductor device comprising a step of ultrasonically bonding a connection conductor to an upper surface electrode of a semiconductor chip and a lead terminal of a lead frame,
A first pressing portion that presses a joint between the upper surface electrode of the semiconductor chip and a connection conductor; and a joint between the lead terminal of the lead frame and the connection conductor that is located on a different plane from the first pressing portion. Using an ultrasonic bonding tool having a second pressing portion to be pressed and a plurality of protrusions formed on the first and second pressing portions,
A plate or strip-shaped connecting conductor placed across the upper surface electrode of the semiconductor chip and the lead terminal of the lead frame located on a plane different from the plane of the upper surface electrode is connected to the upper surface electrode and the lead terminal. A method of manufacturing a semiconductor device, wherein ultrasonic bonding is performed simultaneously.
前記半導体チップの上面電極と接続導体との接合部を押圧する第1押圧部と、前記リードフレームのリード端子と前記接続導体との接合部を押圧し、且つ前記第1押圧部と異なる押圧力を生じせしめる第2押圧部と、前記第1および第2押圧部に形成された複数の突起とを有する超音波接合具を用いて、
前記半導体チップの上面電極とこの上面電極の材質と異なる材質からなる前記リードフレームのリード端子とに跨って載置された板または帯状の前記接続導体を前記上面電極と前記リード端子に対して同時に超音波接合することを特徴とする半導体装置の製造方法。A method of manufacturing a semiconductor device comprising a step of ultrasonically bonding a connection conductor to an upper surface electrode of a semiconductor chip and a lead terminal of a lead frame,
A first pressing portion that presses a bonding portion between the upper surface electrode of the semiconductor chip and the connection conductor; and a pressing force that presses the bonding portion between the lead terminal of the lead frame and the connection conductor and is different from the first pressing portion. Using an ultrasonic bonding tool having a second pressing portion that causes a plurality of protrusions and a plurality of protrusions formed on the first and second pressing portions,
A plate or strip-shaped connecting conductor placed across the upper surface electrode of the semiconductor chip and the lead terminal of the lead frame made of a material different from the material of the upper surface electrode is simultaneously applied to the upper surface electrode and the lead terminal. A method for manufacturing a semiconductor device, comprising ultrasonic bonding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003006563A JP3753426B2 (en) | 2003-01-15 | 2003-01-15 | Ultrasonic bonding tool and method for manufacturing semiconductor device using ultrasonic bonding tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003006563A JP3753426B2 (en) | 2003-01-15 | 2003-01-15 | Ultrasonic bonding tool and method for manufacturing semiconductor device using ultrasonic bonding tool |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004221294A true JP2004221294A (en) | 2004-08-05 |
JP3753426B2 JP3753426B2 (en) | 2006-03-08 |
Family
ID=32896891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003006563A Expired - Fee Related JP3753426B2 (en) | 2003-01-15 | 2003-01-15 | Ultrasonic bonding tool and method for manufacturing semiconductor device using ultrasonic bonding tool |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3753426B2 (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006135270A (en) * | 2004-10-06 | 2006-05-25 | Fuji Electric Holdings Co Ltd | Semiconductor device and its manufacturing method |
JP2006179704A (en) * | 2004-12-22 | 2006-07-06 | Sumitomo Electric Ind Ltd | Semiconductor device |
JP2006196629A (en) * | 2005-01-13 | 2006-07-27 | Nec Electronics Corp | Semiconductor device, bonding method, and bonding ribbon |
US7134588B2 (en) * | 2004-09-29 | 2006-11-14 | Fujitsu Limited | Bonding tool for ultrasonic bonding and method of ultrasonic bonding |
JP2008529303A (en) * | 2005-01-27 | 2008-07-31 | オーソダイン エレクトロニクス コーポレイション | Ribbon bonding tool and rebonding method |
JP2009147103A (en) * | 2007-12-14 | 2009-07-02 | Renesas Technology Corp | Semiconductor device and manufacturing method of same |
JP2009194154A (en) * | 2008-02-14 | 2009-08-27 | Toshiba Corp | Ultrasonic joining apparatus and method of manufacturing semiconductor device |
US7804160B2 (en) | 2004-11-09 | 2010-09-28 | Kabushiki Kaisha Toshiba | Ultrasonic bonding equipment for manufacturing semiconductor device, semiconductor device and its manufacturing method |
JP2011135048A (en) * | 2009-11-26 | 2011-07-07 | Kyocera Corp | Solar cell module, and device for manufacturing the same |
JP2012129467A (en) * | 2010-12-17 | 2012-07-05 | Mitsubishi Electric Corp | Semiconductor device manufacturing method, ultrasonic bonding device and semiconductor device |
WO2017157680A1 (en) * | 2016-03-14 | 2017-09-21 | Siemens Aktiengesellschaft | Semiconductor module and method for the production thereof |
US10396317B2 (en) * | 2011-05-30 | 2019-08-27 | Lg Chem, Ltd. | Ultrasonic welding apparatus and secondary battery with enhanced electrode structure |
CN110293308A (en) * | 2014-08-11 | 2019-10-01 | 三星Sdi株式会社 | Ultrasonic welding device, the method and rechargeable battery for manufacturing rechargeable battery |
CN118543951A (en) * | 2024-08-01 | 2024-08-27 | 瑞浦兰钧能源股份有限公司 | Ultrasonic welding device and ultrasonic welding method |
-
2003
- 2003-01-15 JP JP2003006563A patent/JP3753426B2/en not_active Expired - Fee Related
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7134588B2 (en) * | 2004-09-29 | 2006-11-14 | Fujitsu Limited | Bonding tool for ultrasonic bonding and method of ultrasonic bonding |
JP2006135270A (en) * | 2004-10-06 | 2006-05-25 | Fuji Electric Holdings Co Ltd | Semiconductor device and its manufacturing method |
JP4586508B2 (en) * | 2004-10-06 | 2010-11-24 | 富士電機システムズ株式会社 | Semiconductor device and manufacturing method thereof |
US7804160B2 (en) | 2004-11-09 | 2010-09-28 | Kabushiki Kaisha Toshiba | Ultrasonic bonding equipment for manufacturing semiconductor device, semiconductor device and its manufacturing method |
JP2006179704A (en) * | 2004-12-22 | 2006-07-06 | Sumitomo Electric Ind Ltd | Semiconductor device |
JP2006196629A (en) * | 2005-01-13 | 2006-07-27 | Nec Electronics Corp | Semiconductor device, bonding method, and bonding ribbon |
JP4526957B2 (en) * | 2005-01-13 | 2010-08-18 | ルネサスエレクトロニクス株式会社 | Semiconductor device, bonding method and bonding ribbon |
JP4662497B2 (en) * | 2005-01-27 | 2011-03-30 | オーソダイン エレクトロニクス コーポレイション | Ribbon bonding tool and rebonding method |
JP2008529303A (en) * | 2005-01-27 | 2008-07-31 | オーソダイン エレクトロニクス コーポレイション | Ribbon bonding tool and rebonding method |
US7934633B2 (en) | 2005-01-27 | 2011-05-03 | Orthodyne Electronics Corporation | Ribbon bonding tool and process |
US7909228B2 (en) | 2005-01-27 | 2011-03-22 | Orthodyne Electronics Corporation | Ribbon bonding tool and process |
JP2009147103A (en) * | 2007-12-14 | 2009-07-02 | Renesas Technology Corp | Semiconductor device and manufacturing method of same |
JP2009194154A (en) * | 2008-02-14 | 2009-08-27 | Toshiba Corp | Ultrasonic joining apparatus and method of manufacturing semiconductor device |
JP2011135048A (en) * | 2009-11-26 | 2011-07-07 | Kyocera Corp | Solar cell module, and device for manufacturing the same |
JP2012129467A (en) * | 2010-12-17 | 2012-07-05 | Mitsubishi Electric Corp | Semiconductor device manufacturing method, ultrasonic bonding device and semiconductor device |
US10396317B2 (en) * | 2011-05-30 | 2019-08-27 | Lg Chem, Ltd. | Ultrasonic welding apparatus and secondary battery with enhanced electrode structure |
CN110293308A (en) * | 2014-08-11 | 2019-10-01 | 三星Sdi株式会社 | Ultrasonic welding device, the method and rechargeable battery for manufacturing rechargeable battery |
CN110293308B (en) * | 2014-08-11 | 2021-11-09 | 三星Sdi株式会社 | Ultrasonic welding device, method of manufacturing rechargeable battery, and rechargeable battery |
WO2017157680A1 (en) * | 2016-03-14 | 2017-09-21 | Siemens Aktiengesellschaft | Semiconductor module and method for the production thereof |
CN118543951A (en) * | 2024-08-01 | 2024-08-27 | 瑞浦兰钧能源股份有限公司 | Ultrasonic welding device and ultrasonic welding method |
CN118543951B (en) * | 2024-08-01 | 2024-10-18 | 瑞浦兰钧能源股份有限公司 | Ultrasonic welding device and ultrasonic welding method |
Also Published As
Publication number | Publication date |
---|---|
JP3753426B2 (en) | 2006-03-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107615464B (en) | Method for manufacturing power semiconductor device and power semiconductor device | |
JP3753426B2 (en) | Ultrasonic bonding tool and method for manufacturing semiconductor device using ultrasonic bonding tool | |
JP5696780B2 (en) | Semiconductor device and manufacturing method thereof | |
US20100007009A1 (en) | Semiconductor package and method for processing and bonding a wire | |
TWI250622B (en) | Semiconductor package having high quantity of I/O connections and method for making the same | |
TWI351750B (en) | Stack package having reduced electrical connection | |
US20050104166A1 (en) | Semiconductor device and manufacturing method thereof | |
KR100721280B1 (en) | A method of forming semiconductor chip assembly and an apparatus for forming wire bonds from circuitry on a substrate to a semiconductor chip | |
JP2010040615A (en) | Semiconductor device | |
JPH0636852A (en) | Method for connecting terminal to printed wiring board | |
JP5566296B2 (en) | Manufacturing method of semiconductor device | |
JP4374040B2 (en) | Semiconductor manufacturing equipment | |
JP2006135270A (en) | Semiconductor device and its manufacturing method | |
JP4430062B2 (en) | IC chip mounting package manufacturing method | |
JP2000196005A (en) | Semiconductor device | |
JP4601141B2 (en) | Semiconductor device manufacturing method and semiconductor device | |
EP0999586A2 (en) | Semiconductor device and method of producing same | |
JP2003318216A (en) | Wire bonding method | |
JP4550503B2 (en) | Semiconductor device | |
JP3991649B2 (en) | Semiconductor device manufacturing method and semiconductor device | |
JP2005011899A (en) | Lead frame and electronic component using the same | |
JP2004207291A (en) | Semiconductor device and its manufacturing method, circuit board, and electronic equipment | |
JP4326385B2 (en) | Semiconductor device | |
JP2004119670A (en) | Semiconductor device using power element | |
JPH0729925A (en) | Semiconductor device and its manufacture |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20041005 |
|
RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20050415 |
|
RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20050606 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050727 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050729 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050926 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20051018 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20051117 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20051209 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20051212 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091222 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091222 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101222 Year of fee payment: 5 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111222 Year of fee payment: 6 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121222 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121222 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131222 Year of fee payment: 8 |
|
LAPS | Cancellation because of no payment of annual fees |