Invention Application
- Patent Title: SEMICONDUCTOR DEVICE
- Patent Title (中): 半导体器件
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Application No.: US15152117Application Date: 2016-05-11
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Publication No.: US20160334573A1Publication Date: 2016-11-17
- Inventor: Hiroyuki KUNISHIMA , Yasutaka NAKASHIBA , Masaru WAKABAYASHI , Shinichi WATANUKI
- Applicant: RENESAS ELECTRONICS CORPORATION
- Priority: JP2015-099864 20150515
- Main IPC: G02B6/122
- IPC: G02B6/122 ; G02B6/28 ; H01L23/522 ; G02F1/025 ; H01L23/528 ; H01L23/532

Abstract:
A low reflectance film with a second reflectance (50% or lower) lower than a first reflectance is formed between an optical directional coupler and a first-layer wiring with the first reflectance. Thus, even when the first-layer wiring is formed above the optical directional coupler, the influence of the light reflected by the first-layer wiring on the optical signal propagating through the first optical waveguide and the second optical waveguide of the optical directional coupler can be reduced. Accordingly, the first-layer wiring can be arranged above the optical directional coupler, and the restriction on the layout of the first-layer wiring is relaxed.
Public/Granted literature
- US09835882B2 Semiconductor device Public/Granted day:2017-12-05
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