JP2013175795A5 - - Google Patents
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- JP2013175795A5 JP2013175795A5 JP2013123951A JP2013123951A JP2013175795A5 JP 2013175795 A5 JP2013175795 A5 JP 2013175795A5 JP 2013123951 A JP2013123951 A JP 2013123951A JP 2013123951 A JP2013123951 A JP 2013123951A JP 2013175795 A5 JP2013175795 A5 JP 2013175795A5
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本発明は、半導体チップを載せる素子搭載部が封止樹脂の裏面から露出しているパッドタイプまたは放熱板（ヒートシンク）タイプの半導体装置に使用するリードフレームの製造方法に関する。 The present invention relates to a method for manufacturing a lead frame used in a pad type or heat sink (heat sink) type semiconductor device in which an element mounting portion on which a semiconductor chip is mounted is exposed from the back surface of a sealing resin.
半導体チップを載せる素子搭載部が封止樹脂の裏面から露出しているパッドタイプまたは放熱板タイプの半導体装置では、素子搭載部の裏面をモールド金型に押し当てて封止樹脂を充填するときに、封止樹脂が素子搭載部の裏面とモールド金型との間に流れ込み、素子搭載部の裏面側に薄バリが発生している。このため、素子搭載部の露出部の実効的な面積が減少して放熱効果が低下するという問題が生じている。
そこで、素子搭載部の外周部に素子搭載部（パッド）中央部よりも厚みの薄い薄肉部を形成して、封止樹脂の充填時に封止樹脂が薄肉部に載り易くして素子搭載部の裏面とモールド金型との間に封止樹脂が流れ込み難くしている（例えば、特許文献１参照）。また、素子搭載部の裏面側にリング状の溝を形成し、封止樹脂の充填時に素子搭載部の裏面とモールド金型との間に進入した封止樹脂をこの溝内に流入させることで、封止樹脂の注入圧力を逃がし封止樹脂が溝を越えて進入するのを防止して薄バリの発生を一定範囲内に抑え、素子搭載部の露出部の実効的な面積を確保している（例えば、特許文献２参照）。
In a pad type or heat sink type semiconductor device in which the element mounting portion on which the semiconductor chip is mounted is exposed from the back surface of the sealing resin, when the back surface of the element mounting portion is pressed against the mold and filled with the sealing resin The sealing resin flows between the back surface of the element mounting portion and the mold, and thin burrs are generated on the back surface side of the device mounting portion. For this reason, there is a problem that the effective area of the exposed portion of the element mounting portion is reduced and the heat dissipation effect is lowered.
Therefore, a thin portion thinner than the center portion of the element mounting portion (pad) is formed on the outer peripheral portion of the element mounting portion so that the sealing resin can easily be placed on the thin portion when the sealing resin is filled. It is difficult for the sealing resin to flow between the back surface and the mold (see, for example, Patent Document 1). In addition, a ring-shaped groove is formed on the back surface side of the element mounting portion, and the sealing resin that has entered between the back surface of the element mounting portion and the mold when filling the sealing resin is allowed to flow into the groove. The injection pressure of the sealing resin is relieved to prevent the sealing resin from entering beyond the groove, thereby suppressing the occurrence of thin burrs within a certain range and ensuring the effective area of the exposed part of the element mounting part. (For example, refer to Patent Document 2).
ここで、半導体チップを載せる素子搭載部が封止樹脂の裏面から露出している半導体装置用のリードフレームにおいては、素子搭載部を金型で打ち抜く際に、数μｍ（１０〜２０μｍ程度）の反りが発生し、特許文献１、２に記載された発明では、素子搭載部の裏面をモールド金型に押し当てて封止樹脂を充填するときに素子搭載部裏面の縁部側がモールド金型に対して浮き上がる。このため、封止樹脂が素子搭載部の裏面とモールド金型との間に容易に流れ込み、素子搭載部の裏面側に薄バリが発生するという問題が生じる。 Here, in the lead frame for a semiconductor device in which the element mounting portion on which the semiconductor chip is placed is exposed from the back surface of the sealing resin, when the element mounting portion is punched out with a mold, it is several μm (about 10 to 20 μm). In the invention described in Patent Documents 1 and 2, when the back surface of the element mounting portion is pressed against the mold die and filled with the sealing resin, the edge side of the back surface of the element mounting portion becomes the mold die. It rises against it. For this reason, there is a problem that the sealing resin easily flows between the back surface of the element mounting portion and the mold, and thin burrs are generated on the back surface side of the element mounting portion.
本発明はかかる事情に鑑みてなされたもので、封止樹脂充填時に封止樹脂が素子搭載部の裏面とモールド金型との間に流れ込んで薄バリが発生するのを防止して高い放熱効果を図ることが可能なパッドタイプまたは放熱板タイプの半導体装置に使用するリードフレームの製造方法を提供することを目的とする。 The present invention has been made in view of such circumstances, and when the sealing resin is filled, the sealing resin can be prevented from flowing between the back surface of the element mounting portion and the mold mold, thereby generating a thin burr, and a high heat dissipation effect. An object of the present invention is to provide a method of manufacturing a lead frame used in a pad type or heat sink type semiconductor device capable of achieving the above.
前記目的に沿う本発明に係るリードフレームの製造方法は、半導体チップを載せる素子搭載部が封止樹脂の裏面から露出しているパッドタイプまたは放熱板タイプの半導体装置に使用するリードフレームの製造方法において、
前記素子搭載部の成形時に、該素子搭載部を載せるダイに矩形溝を設けて、前記ダイ上に配置されたパンチガイドでガイドされたパンチで前記素子搭載部を押圧することによって、前記素子搭載部の露出面周囲に樹脂封止時に薄バリの発生を防止する平面視して矩形の突出壁を設ける。
ここで、前記突出壁の高さは０．５〜１０μｍ、幅は５〜５０μｍの範囲であることが好ましい。
A lead frame manufacturing method according to the present invention that meets the above-described object is a method for manufacturing a lead frame used in a pad type or heat sink type semiconductor device in which an element mounting portion on which a semiconductor chip is mounted is exposed from the back surface of the sealing resin. In
At the time of forming the element mounting portion, a rectangular groove is provided in a die on which the element mounting portion is placed, and the element mounting portion is pressed by a punch guided by a punch guide disposed on the die. A rectangular protruding wall is provided around the exposed surface of the portion in plan view to prevent generation of thin burrs during resin sealing .
Here, it is preferable that the protruding wall has a height of 0.5 to 10 μm and a width of 5 to 50 μm.
本発明に係るリードフレームの製造方法において、前記リードフレームはパッドタイプの前記半導体装置に使用するものであって、前記突出壁の形成は、１）前記素子搭載部の打ち抜き形成時、２）前記素子搭載部の打ち抜き形成後の反り矯正時、３）前記素子搭載部のめっき後のディプレス加工時のいずれかの時期に行なうことができる。
本発明に係るリードフレームの製造方法において、前記リードフレームは放熱板タイプの前記半導体装置に使用するものであって、前記突出壁の形成は、１）放熱板からなる前記素子搭載部の打ち抜き時、２）前記素子搭載部の打ち抜き形成後に別工程で反り矯正を行なう時のいずれかの時期に行なうことができる。
In the lead frame manufacturing method according to the present invention, the lead frame is used for the pad type semiconductor device, and the projecting wall is formed by 1) at the time of punching formation of the element mounting portion, 2) It can be performed at any time of warping correction after punching formation of the element mounting portion, and 3) at the time of depressing after plating of the element mounting portion.
In the lead frame manufacturing method according to the present invention, the lead frame is used in the heat sink type semiconductor device, and the projecting wall is formed by 1) at the time of punching the element mounting portion made of a heat sink. 2) It can be performed at any time when warp correction is performed in a separate process after the formation of the element mounting portion.
請求項１〜３記載のリードフレームの製造方法においては、素子搭載部（パッドまたは放熱板）の裏面をモールド金型に押し当てた際に突出壁の頂部がモールド金型に当接するので、封止樹脂充填時に注入された封止樹脂をこの突出壁で堰止めて封止樹脂が素子搭載部の裏面とモールド金型との間に流れ込むのを阻止することができ、素子搭載部の裏面に封止樹脂の薄バリが発生するのを防止することが可能になる。その結果、素子搭載部の露出部の実効的な面積が確保されて、高い放熱効果を図ることが可能となる。 Oite the manufacture how the lead frame of claim 1, wherein the top portion of the projecting wall when pressed against the back surface of the element mounting portion (pad or heat radiating plate) in the molding die comes into contact with the mold Therefore, the sealing resin injected at the time of filling the sealing resin is blocked by this protruding wall, and the sealing resin can be prevented from flowing between the back surface of the element mounting portion and the mold die. It is possible to prevent a thin burr of the sealing resin from occurring on the back surface of the resin. As a result, an effective area of the exposed portion of the element mounting portion is ensured, and a high heat dissipation effect can be achieved.
特に、このリードフレームの製造方法において、突出壁の高さを０．５〜１０μｍ、幅を５〜５０μｍの範囲にした場合は、露出している素子搭載部に突出壁が設けられても、リードフレームの取り扱い、半導体装置の取り扱いに問題は生じない。 In particular, in this lead frame manufacturing method, when the height of the protruding wall is in the range of 0.5 to 10 μm and the width is in the range of 5 to 50 μm, even if the protruding wall is provided on the exposed element mounting portion, There is no problem in handling the lead frame and the semiconductor device.
請求項２、３記載のリードフレームの製造方法においては、各工程の処理内容を考慮して最適な時期に素子搭載部に突出壁を形成することができる。 In the lead frame manufacturing method according to the second and third aspects, the protruding wall can be formed on the element mounting portion at an optimum time in consideration of the processing contents of each step.
続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
図１に示すように、本発明の第１の実施の形態に係る半導体装置１０はパッドを有するタイプであって、半導体チップ１１を載せる素子搭載部（パッド）１２が封止樹脂１３の裏面から露出して、露出している素子搭載部１２の裏面（露出面）の周囲に突出壁１４が設けられている。ここで、突出壁１４の高さＨは０．５〜１０μｍ、幅Ｗは５〜５０μｍの範囲に形成されている。また、素子搭載部１２は平面視して半導体装置１０の中央にあって、その周囲に素子搭載部１２に載った半導体チップ１１の電極パッド１５のそれぞれにボンディングワイヤ１６によって連結されたリード１７が配置されている。
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1, the semiconductor device 10 according to the first embodiment of the present invention is a type having a pad, and an element mounting portion (pad) 12 on which a semiconductor chip 11 is mounted is formed from the back surface of the sealing resin 13. A protruding wall 14 is provided around the exposed back surface (exposed surface) of the exposed element mounting portion 12. Here, the height H of the protruding wall 14 is 0.5 to 10 μm, and the width W is 5 to 50 μm. The element mounting portion 12 is in the center of the semiconductor device 10 in plan view, and leads 17 connected to the electrode pads 15 of the semiconductor chip 11 mounted on the element mounting portion 12 by bonding wires 16 around the element mounting portion 12. Has been placed.
素子搭載部１２の裏面の周囲に突出壁１４を設けることにより、素子搭載部１２の裏面をモールド金型に押し当てた際に、突出壁１４の頂部をモールド金型に密接させることができる。これにより、封止樹脂充填時に注入された封止樹脂１３はこの突出壁１４で堰止められ、封止樹脂１３が素子搭載部１２の裏面とモールド金型との間に流れ込むのが阻止される。その結果、素子搭載部１２の裏面に封止樹脂１３の薄バリが発生するのが防止される。そして、素子搭載部１２の裏面に封止樹脂１３の薄バリが発生しないことから、素子搭載部１２裏面の露出部の実効的な面積が確保されて高い放熱効果を得ることができる。
なお、突出壁１４の高さおよび幅を規定することによって、突出壁１４が素子搭載部１２の裏面に設けられても、半導体装置１０の取り扱いに問題は生じない。
By providing the protruding wall 14 around the back surface of the element mounting portion 12, the top portion of the protruding wall 14 can be brought into close contact with the mold die when the back surface of the element mounting portion 12 is pressed against the mold die. As a result, the sealing resin 13 injected at the time of filling the sealing resin is blocked by the protruding wall 14, and the sealing resin 13 is prevented from flowing between the back surface of the element mounting portion 12 and the mold. . As a result, the occurrence of a thin burr of the sealing resin 13 on the back surface of the element mounting portion 12 is prevented. And since the thin burr | flash of the sealing resin 13 does not generate | occur | produce in the back surface of the element mounting part 12, the effective area of the exposed part of the element mounting part 12 back surface is ensured, and a high heat dissipation effect can be acquired.
Note that, by defining the height and width of the protruding wall 14, there is no problem in handling the semiconductor device 10 even if the protruding wall 14 is provided on the back surface of the element mounting portion 12.
続いて、本発明の第１の実施の形態に係る半導体装置１０の製造方法について説明する。
先ず、図２に示すように、リードフレーム１８を、例えば、銅等の金属シートの打ち抜きにより形成する。リードフレーム１８は、中央に配置された素子搭載部１２と、その周囲に放射状に配置された複数のリード１７と、中央の素子搭載部１２の角部を周囲から支持するサポートバー１９と、各リード１７を連結している枠部（図示せず）とを有している。
Next, a method for manufacturing the semiconductor device 10 according to the first embodiment of the present invention will be described.
First, as shown in FIG. 2, the lead frame 18 is formed by punching a metal sheet such as copper. The lead frame 18 includes an element mounting portion 12 disposed in the center, a plurality of leads 17 radially disposed around the lead frame 18, a support bar 19 that supports corners of the central element mounting portion 12 from the periphery, And a frame portion (not shown) connecting the leads 17.
ここで、突出壁１４は、例えば、図３に示すように、素子搭載部１２の打ち抜き形成時に、素子搭載部１２を載せるダイ２０に矩形溝２１を設けてパンチガイド２２でガイドされたパンチ２３で素子搭載部１２を押圧することによって形成される。なお、矩形溝２１の深さは０．５〜１０μｍ、幅は５〜５０μｍの範囲で形成されている。その後、リードフレーム１８の素子搭載部１２にはめっき処理が施された後にディプレス加工される。 Here, for example, as shown in FIG. 3, the protruding wall 14 is provided with a punch 23 that is guided by a punch guide 22 by providing a rectangular groove 21 in the die 20 on which the element mounting portion 12 is placed when the element mounting portion 12 is formed by punching. It is formed by pressing the element mounting portion 12. The rectangular groove 21 has a depth of 0.5 to 10 μm and a width of 5 to 50 μm. Thereafter, the element mounting portion 12 of the lead frame 18 is subjected to a pressing process after being plated.
そして、リードフレーム１８の素子搭載部１２に半導体チップ１１を、例えば、銀ペースト等の金属ペーストを用いて固定する。次に、半導体チップ１１の電極パッド１５とリード１７のインナーリード部２４との間をボンディングワイヤ１６で接続する。続いて、図示しないモールド金型内に半導体チップ１１が搭載されたリードフレーム１８を配置し、素子搭載部１２の裏面の周囲に形成された突出壁１４の頂部がモールド金型の下型内面に密接するようにセットする。そして、封止樹脂（例えば、熱硬化性樹脂）１３をモールド金型内に注入し、半導体チップ１１、ボンディングワイヤ１６、およびインナーリード部２０を封止樹脂１３で封止する。ここで突出壁１４の頂部がモールド金型の下型内面に密接しているので、注入された封止樹脂１３はこの突出壁１４で堰止められ、封止樹脂１３が素子搭載部１２の裏面とモールド金型との間に流れ込むのが阻止される。封止が終了すると、リード１７を連結している枠部を除去し、リード１７のアウターリード部２５を回路基板に実装し易い形に曲げる。これによって半導体装置１０の製造が完了する。 Then, the semiconductor chip 11 is fixed to the element mounting portion 12 of the lead frame 18 using, for example, a metal paste such as a silver paste. Next, the bonding pads 16 connect the electrode pads 15 of the semiconductor chip 11 and the inner lead portions 24 of the leads 17. Subsequently, the lead frame 18 on which the semiconductor chip 11 is mounted is placed in a mold die (not shown), and the top of the protruding wall 14 formed around the back surface of the element mounting portion 12 is on the inner surface of the lower mold of the mold die. Set closely. Then, a sealing resin (for example, a thermosetting resin) 13 is injected into the mold, and the semiconductor chip 11, the bonding wire 16, and the inner lead portion 20 are sealed with the sealing resin 13. Here, since the top portion of the protruding wall 14 is in close contact with the lower mold inner surface of the mold, the injected sealing resin 13 is blocked by the protruding wall 14, and the sealing resin 13 is the back surface of the element mounting portion 12. Is prevented from flowing between the mold and the mold. When the sealing is completed, the frame portion connecting the leads 17 is removed, and the outer lead portions 25 of the leads 17 are bent so as to be easily mounted on the circuit board. Thereby, the manufacture of the semiconductor device 10 is completed.
図４に示すように、本発明の第２の実施の形態に係る半導体装置２６は放熱板を有するタイプであって、放熱板からなる素子搭載部２７が封止樹脂１３の裏面から露出して、露出している素子搭載部２７の裏面（露出面）の周囲に突出壁２８が設けられている。ここで、突出壁２８の高さは０．５〜１０μｍ、幅は５〜５０μｍの範囲に形成されている。また、素子搭載部２７は平面視して半導体装置２６の中央にあって、その周囲に素子搭載部２７に載った半導体チップ１１の電極パッド１５のそれぞれにボンディングワイヤ２９によって連結されたリード３０が配置されている。 As shown in FIG. 4, the semiconductor device 26 according to the second embodiment of the present invention is a type having a heat sink, and the element mounting portion 27 made of the heat sink is exposed from the back surface of the sealing resin 13. A protruding wall 28 is provided around the back surface (exposed surface) of the exposed element mounting portion 27. Here, the height of the protruding wall 28 is formed in a range of 0.5 to 10 μm and a width of 5 to 50 μm. The element mounting portion 27 is located in the center of the semiconductor device 26 in plan view, and leads 30 connected to the electrode pads 15 of the semiconductor chip 11 mounted on the element mounting portion 27 by bonding wires 29 around the element mounting portion 27. Has been placed.
素子搭載部２７の裏面の周囲に突出壁２８を設けることにより、素子搭載部２７の裏面をモールド金型に押し当てた際に、突出壁２８の頂部をモールド金型に密接させることができる。これにより、封止樹脂充填時に注入された封止樹脂１３はこの突出壁２８で堰止められ、封止樹脂１３が素子搭載部２７の裏面とモールド金型との間に流れ込むのが阻止される。その結果、素子搭載部２７の裏面に封止樹脂１３の薄バリが発生するのが防止される。そして、素子搭載部２７の裏面に封止樹脂１３の薄バリが発生しないことから、素子搭載部２７の裏面の露出部の実効的な面積が確保されて高い放熱効果を得ることができる。
なお、突出壁２８の高さおよび幅を規定することによって、突出壁２８が素子搭載部２７の裏面に設けられても、半導体装置２６の取り扱いに問題は生じない
By providing the protruding wall 28 around the back surface of the element mounting portion 27, the top portion of the protruding wall 28 can be brought into close contact with the mold die when the back surface of the element mounting portion 27 is pressed against the mold die. As a result, the sealing resin 13 injected at the time of filling the sealing resin is blocked by the protruding wall 28, and the sealing resin 13 is prevented from flowing between the back surface of the element mounting portion 27 and the mold. . As a result, the occurrence of a thin burr of the sealing resin 13 on the back surface of the element mounting portion 27 is prevented. And since the thin burr | flash of the sealing resin 13 does not generate | occur | produce in the back surface of the element mounting part 27, the effective area of the exposed part of the back surface of the element mounting part 27 is ensured, and a high heat dissipation effect can be acquired.
Note that, by defining the height and width of the protruding wall 28, there is no problem in handling the semiconductor device 26 even if the protruding wall 28 is provided on the back surface of the element mounting portion 27.
続いて、本発明の第２の実施の形態に係る半導体装置２６の製造方法について説明する。図５に示すように、半導体装置２６に用いるリードフレーム３１は、素子搭載部２７と、中央部に素子搭載部２７を収容する空間部３３が設けられ、空間部３３の周囲に放射状に配置された複数のリード３０、空間部３３の各隅部に先部が突出するように放射状に配置されたサポートバー３２、および各リード３０およびサポートバー３２を連結している枠部（図示せず）とを備えたリード部３４とを有している。従って、先ず、熱伝導性のよい金属（例えば、銅または銅合金）からなって比較的厚みの厚いシート材から素子搭載部２７を打ち抜きにより形成する。このとき、素子搭載部２７の各角部にはかしめ部３５を同時に形成する。なお、かしめ部３５は、素子搭載部２７を打ち抜き形成する工程とは別の工程で形成することもできる。 Next, a method for manufacturing the semiconductor device 26 according to the second embodiment of the present invention will be described. As shown in FIG. 5, the lead frame 31 used in the semiconductor device 26 is provided with an element mounting portion 27 and a space portion 33 that accommodates the element mounting portion 27 at the center, and is arranged radially around the space portion 33. A plurality of leads 30, support bars 32 arranged radially so that the front ends protrude from the corners of the space 33, and a frame portion (not shown) connecting the leads 30 and the support bars 32. And a lead portion 34 provided with. Therefore, first, the element mounting portion 27 is formed by stamping from a relatively thick sheet material made of a metal having good thermal conductivity (for example, copper or copper alloy). At this time, the caulking portions 35 are simultaneously formed at the respective corner portions of the element mounting portion 27. The caulking portion 35 can also be formed in a step different from the step of punching and forming the element mounting portion 27.
ここで、突出壁２８は、素子搭載部２７の打ち抜き形成時に、素子搭載部２７を載せるダイに矩形溝を設けてパンチガイドでガイドされたパンチで素子搭載部２７を押圧することによって形成される。また、突出壁２８の形成には、図３に示すパンチ機構と実質的に同様のパンチ機構を使用することができ、矩形溝２１の深さは０．５〜１０μｍ、幅は５〜５０μｍの範囲で形成されている。素子搭載部２７は打ち抜き後に必要に応じて反り矯正が行なわれ、更にめっき処理が施される。 Here, the protruding wall 28 is formed by forming a rectangular groove in a die on which the element mounting portion 27 is placed and pressing the element mounting portion 27 with a punch guided by a punch guide when the element mounting portion 27 is punched. . Further, for the formation of the protruding wall 28, a punch mechanism substantially similar to the punch mechanism shown in FIG. 3 can be used, and the rectangular groove 21 has a depth of 0.5 to 10 μm and a width of 5 to 50 μm. Formed in a range. The element mounting portion 27 is subjected to warping correction as necessary after punching and further subjected to a plating process.
また、銅または銅合金からなり素子搭載部２７を形成したものとは異なるシート材からリード部３４を打ち抜きにより形成する。このとき、各サポートバー３２の先部にかしめ部３５を同時に形成する。そして、リード部３４の空間部３３内に素子搭載部２７を配置して、サポートバー３２の先部のかしめ部３５と素子搭載部２７の角部のかしめ部３５とをかしめ接合する。これによって、リードフレーム３１の製作が完了する。
なお、素子搭載部２７に半導体チップ１１を固定して半導体装置２６を製造する方法は、第１の実施の形態の半導体装置１０の製造方法と実質的に同一なので、説明は省略する。
Further, the lead portion 34 is formed by punching from a sheet material made of copper or a copper alloy and different from the one on which the element mounting portion 27 is formed. At this time, the caulking portion 35 is simultaneously formed at the front portion of each support bar 32. Then, the element mounting portion 27 is disposed in the space portion 33 of the lead portion 34, and the caulking portion 35 at the tip portion of the support bar 32 and the caulking portion 35 at the corner portion of the element mounting portion 27 are caulked and joined. Thereby, the production of the lead frame 31 is completed.
Note that the method for manufacturing the semiconductor device 26 by fixing the semiconductor chip 11 to the element mounting portion 27 is substantially the same as the method for manufacturing the semiconductor device 10 of the first embodiment, and thus the description thereof is omitted.
以上、本発明を、実施の形態を参照して説明してきたが、本発明は何ら上記した実施の形態に記載した構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変形例も含むものである。
例えば、第１の実施の半導体装置の製造方法においては、突出壁の形成を素子搭載部の打ち抜き形成時に行なったが、素子搭載部の打ち抜き形成後に反り矯正を行なう時、または素子搭載部のめっき後のディプレス加工時のいずれかの時期に行なわれこともできる。
また、第２の実施の半導体装置の製造方法において、突出壁の形成を放熱板の打ち抜き形成後の反り矯正の時期に合わせて行なってもよい。
なお、放熱板タイプの半導体装置において、素子搭載部は放熱板と同じものであるほか、別の放熱材を素子搭載板の下に接合、貼着されたものも含む。
また、近年、多ピンリードフレームで多く見られるように、素子搭載部が正方形や一定の矩形を有していない場合、素子搭載部は平面視して半導体装置の中央よりずれているものもあるが、そのようなものにも本発明は適用可能である。
As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, in the manufacturing method of the semiconductor device according to the first embodiment, the protruding wall is formed at the time of punching the element mounting portion. However, when the warp correction is performed after the punching formation of the element mounting portion, or the plating of the element mounting portion is performed. It can also be done at any time during later pressing.
Further, in the semiconductor device manufacturing method according to the second embodiment, the protruding wall may be formed in accordance with the warp correction time after the heat sink is punched.
In addition, in the heat sink type semiconductor device, the element mounting portion is the same as the heat sink, and includes those in which another heat dissipation material is bonded and pasted under the element mounting plate.
In recent years, as often seen in multi-pin lead frames, when the element mounting portion does not have a square or a fixed rectangle, the element mounting portion may be displaced from the center of the semiconductor device in plan view. However, the present invention is applicable to such a case.
１０：半導体装置、１１：半導体チップ、１２：素子搭載部、１３：封止樹脂、１４：突出壁、１５：電極パッド、１６：ボンディングワイヤ、１７：リード、１８：リードフレーム、１９：サポートバー、２０：ダイ、２１：矩形溝、２２：パンチガイド、２３：パンチ、２４：インナーリード部、２５：アウターリード部、２６：半導体装置、２７：素子搭載部、２８：突出壁、２９：ボンディングワイヤ、３０：リード、３１：リードフレーム、３２：サポートバー、３３：空間部、３４：リード部、３５：かしめ部 10: semiconductor device, 11: semiconductor chip, 12: element mounting portion, 13: sealing resin, 14: protruding wall, 15: electrode pad, 16: bonding wire, 17: lead, 18: lead frame, 19: support bar , 20: die, 21: rectangular groove, 22: punch guide, 23: punch, 24: inner lead part, 25: outer lead part, 26: semiconductor device, 27: element mounting part, 28: protruding wall, 29: bonding Wire: 30: Lead, 31: Lead frame, 32: Support bar, 33: Space part, 34: Lead part, 35: Caulking part
Claims (3)
前記素子搭載部の成形時に、該素子搭載部を載せるダイに矩形溝を設けて、前記ダイ上に配置されたパンチガイドでガイドされたパンチで前記素子搭載部を押圧することによって、前記素子搭載部の露出面周囲に樹脂封止時に薄バリの発生を防止する平面視して矩形の突出壁を設けることを特徴とするリードフレームの製造方法。 In a manufacturing method of a lead frame used for a pad type or heat sink type semiconductor device in which an element mounting portion on which a semiconductor chip is placed is exposed from the back surface of the sealing resin,
At the time of forming the element mounting portion, a rectangular groove is provided in a die on which the element mounting portion is placed, and the element mounting portion is pressed by a punch guided by a punch guide disposed on the die. A method of manufacturing a lead frame, comprising providing a rectangular protruding wall in plan view to prevent the occurrence of thin burrs during resin sealing around the exposed surface of the portion.
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| JP2013123951A JP2013175795A (en) | 2013-06-12 | 2013-06-12 | Manufacturing method of lead frame |
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| JP3885321B2 (en) * | 1997-11-19 | 2007-02-21 | 株式会社デンソー | Manufacturing method of resin-encapsulated semiconductor parts |
| JP3602997B2 (en) * | 1999-12-15 | 2004-12-15 | 松下電器産業株式会社 | Semiconductor device and method of manufacturing semiconductor device |
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