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	Electronic cooling unit
	SHIGA TOMIJI
	1990-05-18
著作权人	日本電気株式会社
专利号	JP1990130986A
国家	日本
文献子类	发明申请
其他题名	Electronic cooling unit
英文摘要	PURPOSE:To shift the parallel resonance frequency of a semiconductor laser module to the low-frequency region out of applicable range as well as to reduce the notch amount by a method wherein the material of a unit printing substrate is specified to be SiC base ceramics containing BeO. CONSTITUTION:The printing substrates 3, 4 of an electronic cooling unit 1 are formed of SiC base ceramics containing BeO base ceramics to print out wiring patterns 8. The SiC base ceramics containing BeO is provided with higher thermal conductivity and dielectric constant than those of aluminum base ceramics thereby facilitating the formation of substrates. Through these procedures, the parasitic capacity of unit can be augmented to reduce the impedance so that the resonance point of small signal frequency characteristics may be shifted to low-frequency region to reduce the notch amount.
公开日期	1990-05-18
申请日期	1988-11-11
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/63186]
专题	半导体激光器专利数据库
作者单位	日本電気株式会社
推荐引用方式 GB/T 7714	SHIGA TOMIJI. Electronic cooling unit. JP1990130986A. 1990-05-18.

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