JP5532570B2 - リードフレーム型基板とその製造方法ならびに半導体装置 - Google Patents
リードフレーム型基板とその製造方法ならびに半導体装置 Download PDFInfo
- Publication number
- JP5532570B2 JP5532570B2 JP2008250799A JP2008250799A JP5532570B2 JP 5532570 B2 JP5532570 B2 JP 5532570B2 JP 2008250799 A JP2008250799 A JP 2008250799A JP 2008250799 A JP2008250799 A JP 2008250799A JP 5532570 B2 JP5532570 B2 JP 5532570B2
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- Prior art keywords
- semiconductor element
- metal plate
- connection terminal
- lead frame
- frame type
- 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.)
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- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 40
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- 239000011347 resin Substances 0.000 claims description 24
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- 238000005530 etching Methods 0.000 claims description 23
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- 238000000034 method Methods 0.000 description 10
- 238000007747 plating Methods 0.000 description 8
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- 238000005452 bending Methods 0.000 description 6
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- 239000000463 material Substances 0.000 description 5
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- MSNOMDLPLDYDME-UHFFFAOYSA-N gold nickel Chemical compound [Ni].[Au] MSNOMDLPLDYDME-UHFFFAOYSA-N 0.000 description 2
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- 238000004382 potting Methods 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
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- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
また、エッチング工法以外に、プレスによる打ち抜き加工によっても得ることができる。半導体パッケージの組立工程としては、半導体素子搭載部に半導体素子をダイボンディングしたのち、金ワイヤー等を用いて、半導体素子の電極とインナーリードを電気的に接続する。その後、インナーリード部を含む半導体素子近傍を樹脂封止し、外枠部を断裁し、必要に応じてアウターリードに曲げ加工を施す。
しかしながら、これらの基板の製造は工程が複雑になり、コスト高になるとともに、基板内の配線接続にめっきが使用されているため、リードフレームタイプのパッケージに比べ、信頼性が劣るという問題がある。
BGAタイプのリードフレームでは、外部接続端子11の数が増加すると、半導体素子電極接続端子9側の配線10長が長くなる。この配線は金属板をハーフエッチングして作製するもので、その幅も厚さも小さく、エッチング以降の工程で折れや曲がりが発生して収率は非常に悪くなるという問題があった。
この対策によると、ボンディング不良の問題をある程度回避させることができると推察されるが、中空状態を完全に回避できるものではない。
これによると、プリモールド樹脂の塗布量の調整が非常に難しく、ポリイミド層を形成する孔部面積が広くなると、中心が薄くなり、微細な配線10をポリイミド層17を担持することができなくなるという問題が心配される。また、中心が薄くなってしまうことによって、場合によっては、次の工程で穴が開いてしまうという問題も心配される。
続端子と、配線を有し、該金属板の第2の面には、該半導体素子電極の接続端子と導通された外部接続端子を有しており、該金属板の中空部分にプリモールド樹脂を充填して樹脂層が形成され、前記樹脂層の前記第1の面側に露出し、前記第1の面側から、前記第2の面側に向けて凸状を成し、前記配線とは導通しておらず、且つ、個々に散在する前記金属板から形成された突起を有すること、を特徴とするリードフレーム型基板である。
又、前記第2の面の該外部接続端子と該外枠部以外の領域には、前記金属板を貫通しない孔部の底面に該金属板から離れる向きに凸状を成し高さが該第2の面の表面よりも低い構造物であり、配線とは導通しておらず、且つ、個々に散在する突起を形成する為のフォトレジストパターンBを形成しておき、
(ロ)前記第2の面の金属板が露出した金属板露出部をエッチングすることにより、前記孔部、及び前記突起の未完成状態である凸状の構造物を形成し、
(ハ)前記孔部に、液状プリモールド樹脂を塗布し、加熱硬化させて樹脂層を形成し、
(ニ)その後、前記第1の面をエッチングすることによって、前記半導体素子搭載部、前記外部接続端子と導通される前記半導体素子電極接続端子、及び前記外枠部を形成し、又、前記凸状の構造物を前記突起として完成させること、
以上を経ることを特徴とするリードフレーム型基板の製造方法である。
また、リードフレームをベースにした基板であり、めっき配線を使用しないため、熱応力に対する信頼性を確保することができる。
一方、係るリードフレーム型基板の作製時には、配線の折れや曲がり等の不良が発生せず、半導体パッケージ組み立て工程で行われるワイヤーボンディングの時、ワイヤーボンディング接続端子の下部は、プリモールド樹脂が外部接続端子表面に均等に充填され、安定して接続が可能となる。
リードフレームに用いられる金属板1の両面に、フォトレジストパターンA(2)を形成する(図1(b))。
つまり、金属板1の第1の面(図1(b)では上面)に、半導体素子搭載部8、半導体素子電極との接続を行う端子である半導体素子電極接続端子9、配線10、及び外枠部12をそれぞれ形成する為のフォトレジストパターンA(2)を形成する。
また第2の面(図1(b)では下面)には、外部接続端子11、外枠部12を形成する為のフォトレジストパターンA(2)を形成する。
ダイアタッチ材16により半導体素子14を貼り付け、金線15で半導体素子電極接続端子9と接続する。必要に応じて、半導体素子電極接続端子には適宜、ニッケル−金めっき、錫めっき、銀めっき、又はニッケル−パラジウム−金めっき、等のいずれかを施しておく。
ワイヤーボンディングを行う際、本リードフレーム型基板をヒートブロックの上に載せ、加熱しながら接合を行うが、半導体素子電極接続端子9の下部にプリモールド樹脂が面一で存在し、中空構造をとらないため、接合不良を起こさず組み立てることができる。
BGAタイプであれば、はんだボールを外部接続端子に搭載して、リードフレーム型基板を用いた半導体パッケージが得られる。
次いで、図1(b)に示すように、この金属板1の両面に、ロールコーターでフォトレジスト(東京応化(株)製、OFPR4000)を5μmの厚さになるようにコーティングした後、90°Cでプレベークを行った。
次に、所望のパターンを有するフオトマスクを介して両面からパターン露光し、その後1%炭酸ナトリウム水溶液で現像処理を行った後に水洗及びポストベークを行い、図1(b)に示すようにフォトレジストパターンA(2)、フォトレジストパターンB(3)を得た。
又、突起5を形成するためのフォトレジストパターンB(3)として、30μm径のフォトレジストのパターンを0.5mmピッチで非配線部にマトリックス状に配置した。
熱硬化樹脂の埋め込み性は良好で、ボイド等の不良は観察されなかった。外部接続端子11、外枠部12のエッチングされなかった面上には、ほとんど熱硬化樹脂が残存しなかったが、その表面洗浄を兼ねて、60°Cの過マンガン酸カリウムのアルカリ水溶液(40g/L過マンガン酸カリウム+20g/L水酸化ナトリウム)に3分ほど処理を行った。
外部接続端子11は半導体素子電極接続端子9から延在している。なお図示していないが、下面側に不要なエッチングが行われないよう、第2回目のエッチング処理時には第2の面側にバックシート等を貼り付けておくのが好ましい。
2 フォトレジストパターンA
3 フォトレジストパターンB (突起の形成用)
4 孔部
5 突起
6 プリモールド樹脂
7 リードフレーム型基板
8 半導体素子搭載部
9 半導体素子電極接続端子
10 配線
11 外部接続端子
12 外枠部
13 半導体素子
14 金線
15 ダイアタッチ材
16 トランスファーモールド樹脂
17 電着ポリイミド層
Claims (3)
- 金属板の第1の面に、半導体素子搭載部と、半導体素子電極の接続端子と、配線を有し、該金属板の第2の面には、該半導体素子電極の接続端子と導通された外部接続端子を有しており、
該金属板の中空部分にプリモールド樹脂を充填して樹脂層が形成され、前記樹脂層の前記第1の面側に露出し、前記第1の面側から、前記第2の面側に向けて凸状を成し、前記配線とは導通しておらず、且つ、個々に散在する前記金属板から形成された突起を有すること、
を特徴とするリードフレーム型基板。 - 金属板の第1の面に半導体素子搭載部、半導体素子電極接続端子、配線、及び外枠部を、又、該金属板の第2の面には外部接続端子、及び外枠部を、それぞれ形成する為のフォトレジストパターンAを形成し、
又、前記第2の面の該外部接続端子と該外枠部以外の領域には、前記金属板を貫通しない孔部の底面に該金属板から離れる向きに凸状を成し高さが該第2の面の表面よりも低い構造物であり、配線とは導通しておらず、且つ、個々に散在する突起を形成する為のフォトレジストパターンBを形成しておき、
前記第2の面の金属板が露出した金属板露出部をエッチングすることにより、前記孔部、及び前記突起の未完成状態である凸状の構造物を形成し、
前記孔部に、液状プリモールド樹脂を塗布し、加熱硬化させて樹脂層を形成し、
その後、前記第1の面をエッチングすることによって、前記半導体素子搭載部、前記外部接続端子と導通される前記半導体素子電極接続端子、及び前記外枠部を形成し、又、前記凸状の構造物を前記突起として完成させること、
以上を経ることを特徴とするリードフレーム型基板の製造方法。 - 請求項1に記載のリードフレーム型基板に半導体素子が搭載されており、該リードフレーム型基板と該半導体素子とがワイヤーボンディングで電気的に接続されていること、を特徴とする半導体装置。
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JP2008250799A JP5532570B2 (ja) | 2008-09-29 | 2008-09-29 | リードフレーム型基板とその製造方法ならびに半導体装置 |
CN2009801381455A CN102165582B (zh) | 2008-09-29 | 2009-09-28 | 引线框基板及其制造方法以及半导体装置 |
KR1020117008030A KR101604154B1 (ko) | 2008-09-29 | 2009-09-28 | 리드 프레임 기판과 그 제조 방법 및 반도체 장치 |
US12/998,098 US8390105B2 (en) | 2008-09-29 | 2009-09-28 | Lead frame substrate, manufacturing method thereof, and semiconductor apparatus |
TW098132770A TWI479626B (zh) | 2008-09-29 | 2009-09-28 | 導線架基板及其製造方法以及半導體裝置 |
PCT/JP2009/004932 WO2010035499A1 (ja) | 2008-09-29 | 2009-09-28 | リードフレーム基板とその製造方法ならびに半導体装置 |
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JP5678727B2 (ja) | 2011-03-03 | 2015-03-04 | セイコーエプソン株式会社 | 振動デバイス、振動デバイスの製造方法、電子機器 |
CN102324413B (zh) * | 2011-09-13 | 2013-03-06 | 江苏长电科技股份有限公司 | 有基岛预填塑封料先刻后镀引线框结构及其生产方法 |
MY176915A (en) * | 2012-02-13 | 2020-08-26 | Semiconductor Components Ind Llc | Method of forming an electronic package and structure |
DE102012215449A1 (de) | 2012-08-31 | 2014-03-27 | Osram Opto Semiconductors Gmbh | Gehäuse für ein elektronisches bauelement, elektronische baugruppe, verfahren zum herstellen eines gehäuses für ein elektronisches bauelement und verfahren zum herstellen einer elektronischen baugruppe |
CN103400771B (zh) * | 2013-08-06 | 2016-06-29 | 江阴芯智联电子科技有限公司 | 先蚀后封芯片倒装三维系统级金属线路板结构及工艺方法 |
CN103413766B (zh) * | 2013-08-06 | 2016-08-10 | 江阴芯智联电子科技有限公司 | 先蚀后封芯片正装三维系统级金属线路板结构及工艺方法 |
CN103456645B (zh) * | 2013-08-06 | 2016-06-01 | 江阴芯智联电子科技有限公司 | 先蚀后封三维系统级芯片正装堆叠封装结构及工艺方法 |
JP6270052B2 (ja) * | 2014-12-05 | 2018-01-31 | Shマテリアル株式会社 | リードフレーム及びその製造方法 |
US9905498B2 (en) * | 2016-05-06 | 2018-02-27 | Atmel Corporation | Electronic package |
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WO2019082344A1 (ja) * | 2017-10-26 | 2019-05-02 | 新電元工業株式会社 | 半導体装置の製造方法 |
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CN102165582A (zh) | 2011-08-24 |
US8390105B2 (en) | 2013-03-05 |
CN102165582B (zh) | 2013-08-07 |
KR20110081813A (ko) | 2011-07-14 |
KR101604154B1 (ko) | 2016-03-25 |
JP2010080895A (ja) | 2010-04-08 |
WO2010035499A1 (ja) | 2010-04-01 |
TW201019445A (en) | 2010-05-16 |
US20110163433A1 (en) | 2011-07-07 |
TWI479626B (zh) | 2015-04-01 |
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