发明授权
- 专利标题: Light emitting apparatus, optical scanning apparatus, and image forming apparatus
- 专利标题(中): 发光装置,光学扫描装置和图像形成装置
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申请号: US12474381申请日: 2009-05-29
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公开(公告)号: US08073028B2公开(公告)日: 2011-12-06
- 发明人: Takayuki Yamaguchi
- 申请人: Takayuki Yamaguchi
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Company, Ltd.
- 当前专利权人: Ricoh Company, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Cooper & Dunham LLP
- 优先权: JP2008-141603 20080529; JP2009-097118 20090413
- 主分类号: H01S3/04
- IPC分类号: H01S3/04 ; H01S3/10 ; G02B26/08 ; G02B26/10 ; G02B26/12
摘要:
A light emitting apparatus includes a surface emitting laser and a ceramic package. The surface emitting laser has a common electrode on the back surface thereof and is mounted on the ceramic package via the common electrode. The common electrode of the surface emitting laser is electrically connected to a mount portion of the ceramic package. The mount portion is electrically connected to a back-surface electrode on the back surface of the ceramic package. The mount portion is also thermally connected to a back-surface heat-dissipating electrode on the back surface of the ceramic package via a penetrating electrode that penetrates the ceramic package. The surface emitting laser is spaced apart from the penetrating electrode in order to prevent inclination in light-emitted direction. The back-surface heat-dissipating electrode prevents destruction of a soldered portion when the light emitting apparatus is mounted on a substrate by soldering.
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