JP5233619B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5233619B2 JP5233619B2 JP2008306797A JP2008306797A JP5233619B2 JP 5233619 B2 JP5233619 B2 JP 5233619B2 JP 2008306797 A JP2008306797 A JP 2008306797A JP 2008306797 A JP2008306797 A JP 2008306797A JP 5233619 B2 JP5233619 B2 JP 5233619B2
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- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
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- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—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
- H01L2224/48221—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
- H01L2224/48245—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
- H01L2224/48247—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 connecting the wire to a bond pad of the item
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
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- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48465—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
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- H01L2224/4899—Auxiliary members for wire connectors, e.g. flow-barriers, reinforcing structures, spacers, alignment aids
- H01L2224/48996—Auxiliary members for wire connectors, e.g. flow-barriers, reinforcing structures, spacers, alignment aids being formed on an item to be connected not being a semiconductor or solid-state body
- H01L2224/48997—Reinforcing structures
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- H01L2224/85—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 wire connector
- H01L2224/85909—Post-treatment of the connector or wire bonding area
- H01L2224/85951—Forming additional members, e.g. for reinforcing
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- H01L2924/19101—Disposition of discrete passive components
- H01L2924/19107—Disposition of discrete passive components off-chip wires
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Description
パッケージは、導電性ワイヤにより半導体素子の電極に接続する正負一対のリード電極と、そのリード電極を絶縁して配置する絶縁性材料である支持部と、から構成された部材である。パッケージは、半導体素子、導電性ワイヤおよび封止部材を配置するための凹部を有する。この凹部の開口形状は、真円や楕円形状に限定されることなく、その外形が円弧と直線とからなる小判型形状(あるいはトラック形状)などとすることができる。この凹部の底面に設けられる壁部は、半導体素子が配置される搭載部と、導電性ワイヤが接続されるリード電極上の接続部との間に、凹部の底面から突出するように設けられる。壁部の形状は、接着剤の流動を阻止することができる形状ならば如何なる形状でもよい。例えば、壁部の断面が三角形、円形または四角形とすることができる。金型を利用して壁部を樹脂で成型する場合、壁部の形成のし易さと、接着剤の流動を阻止する効果を考慮して、壁部の断面は三角形とすることが好ましい。また、壁部は、凹部の底面に直線状に設けるだけでなく、半導体素子の搭載部および導電性ワイヤの接続部の配置を考慮して、接着剤の流動を効果的に阻止することができるように、曲線状または直線状に凹部の底面に設けてもよい。
本形態では、半導体発光素子をパッケージに配置させた半導体装置について説明するが、このような形態に限定されることなく、半導体素子として、発光ダイオードやレーザダイオードのような半導体発光素子のほかに、その半導体発光素子を過電圧による破壊から保護するための保護素子(例えば、ツェナーダイオード、抵抗、トランジスタあるいはコンデンサなど)、受光素子あるいはそれらを少なくとも二種以上組み合わせたものを搭載した半導体装置とすることができる。なお、半導体発光素子の発光色は、赤色系、緑色系または青色系のいずれか一種、あるいはそれらの色を組み合わせたものでよい。
接着剤は、半導体素子をパッケージに固定するための部材である。この接着剤の材料は、特に限定されず、エポキシ樹脂やシリコーン樹脂あるいはそれらの混合樹脂のような絶縁性樹脂を材料とする接着剤や、導電性材料が含有された絶縁性樹脂からなる導電性ペーストとすることができる。ここで、導電性ペーストに含有される導電性材料は、Au、SnあるいはAgが好ましく、より好ましくはAgの含有量が80%〜90%であるAgペーストを用いると放熱性にも優れた半導体装置が得られる。なお、底面側に電極を有する半導体素子は、銀、金、パラジウムなどの金属材料を含む導電性ペーストによってパッケージに接着することができる。
導電性ワイヤは、半導体素子の電極と、パッケージのリード電極とを電気的に接続する金属細線である。導電性ワイヤは、半導体発光素子の電極とのオーミック性、機械的接続性、電気伝導性及び熱伝導性がよいものが求められる。また、作業性などを考慮して導電性ワイヤの直径は、好ましくは、Φ10μm以上、Φ45μm以下である。封止部材に蛍光物質を含有させるとき、蛍光物質が含有された部位と、蛍光物質が含有されていない部位との界面で導電性ワイヤが断線しやすい。そのため、導電性ワイヤの直径は、25μm以上がより好ましく、半導体発光素子の発光面積の確保や扱い易さの観点から35μm以下がより好ましい。このような導電性ワイヤとして具体的には、金、銅、白金、アルミニウム等の金属及びそれらの合金を用いた導電性ワイヤが挙げられる。
封止部材は、パッケージの凹部に配置させた半導体素子や導電性ワイヤを外部環境から保護するため、それらを被覆するように凹部内に配置させる部材である。この封止部材の材料は、特に限定されず、例えば、シリコーン樹脂、エポキシ樹脂、ユリア樹脂、フッ素樹脂、および、それらの樹脂が少なくとも一種以上含有された混合樹脂など、耐候性に優れた透光性樹脂をパッケージの凹部内に充填させた後、硬化させることにより封止部材を形成することができる。また、封止部材の材料は、樹脂に限定されず、ガラス、シリカゲルなどの耐光性に優れた透光性無機材料を用いることもできる。
本形態の半導体装置は、半導体素子として、半導体発光素子を備えるとき、その半導体発光素子からの光により励起されて発光する蛍光物質を凹部内に配置させることができる。半導体発光素子に蛍光物質を配置する形態として、封止部材に蛍光物質を含有させることが好ましい。このような蛍光物質の一例として、以下に述べる希土類元素を含有する蛍光物質がある。
Claims (3)
- 半導体素子と、その半導体素子が搭載された凹部を有し前記凹部の底面に正負一対のリード電極が配置されたパッケージと、前記半導体素子の電極と前記リード電極とを接続する導電性ワイヤと、前記半導体素子を前記凹部の底面に固定する接着剤と、を備えた半導体装置であって、
前記凹部は、楕円または円形の開口形状を有し、前記半導体素子および前記導電性ワイヤを覆う封止部材が配置されており、
前記パッケージは、前記半導体素子の搭載部と前記リード電極における導電性ワイヤの接続部との間に、前記凹部の底面から突出された壁部を有しており、
前記壁部は、前記凹部の底面を横切るように底面の外形をなす円周上の一点から他の点まで直線状に延長されて前記導電性ワイヤの下に設けられた延伸部と、前記凹部の側壁面に接続する端部とから構成されており、前記端部の高さが前記延伸部の高さよりも高く、
前記端部は、前記凹部の開口方向から見て、前記凹部の側壁面と鋭角に接続された側に、前記凹部の底面から開口方向に向かって広がる傾斜面を有することを特徴とする半導体装置。 - 前記半導体素子は、前記凹部の底面に露出された前記リード電極の上に固定されている請求項1に記載の半導体装置。
- 前記壁部は、前記半導体素子の搭載部の側が前記凹部の底面に対して垂直に設けられている請求項1または2に記載の半導体装置。
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JP5927056B2 (ja) * | 2012-06-14 | 2016-05-25 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
JP6374339B2 (ja) | 2015-03-26 | 2018-08-15 | 日亜化学工業株式会社 | 発光装置 |
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JPH05243413A (ja) * | 1992-02-27 | 1993-09-21 | Matsushita Electric Works Ltd | 半導体装置 |
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JP3707024B2 (ja) * | 1997-04-17 | 2005-10-19 | 松下電器産業株式会社 | 電子部品 |
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JP2004200406A (ja) * | 2002-12-18 | 2004-07-15 | Nikon Corp | コイル部材 |
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