Electricity: circuit makers and breakers – Electric switch details – Actuators
Reexamination Certificate
2006-10-12
2009-02-03
Friedhofer, Michael A (Department: 2832)
Electricity: circuit makers and breakers
Electric switch details
Actuators
C200S345000
Reexamination Certificate
active
07485822
ABSTRACT:
Disclosed is a key sheet efficiently diffusing local heat generated by a device mounted on a board. A key sheet has a base sheet formed of a rubber-like elastic material in which a heat conductive filler is mixed. Thus, if a semiconductor device on a board generates heat, it is possible to suppress local heat storage by the heat conductive filler of the base sheet. Further, there is no need to provide a separate member for heat diffusion between the board and the key sheet, making it possible to realize a reduction in thickness. Thus, with the key sheet, it is possible to meet the requirement for heat diffusion to eliminate local heat storage in electronic apparatuses, and the requirement for a reduction in the thickness and weight of electronic apparatuses.
REFERENCES:
patent: 4634824 (1987-01-01), Takano
patent: 4901074 (1990-02-01), Sinn et al.
patent: 5764483 (1998-06-01), Ohashi et al.
patent: 2004/0070940 (2004-04-01), Tomioka et al.
patent: 2004/0170000 (2004-09-01), Fujiwara et al.
patent: 2004/0228088 (2004-11-01), Minamitani et al.
patent: 2004/0240174 (2004-12-01), Ooka et al.
patent: 2005/0158916 (2005-07-01), Hirano et al.
patent: 2007/0000642 (2007-01-01), Yamazaki et al.
patent: 2007/0070935 (2007-03-01), Prakash et al.
patent: 2007/0230120 (2007-10-01), Hata et al.
patent: 05-298961 (1993-11-01), None
patent: 2000-311050 (2000-11-01), None
European Search Report, Jan. 30, 2007.
Koyano Shigeru
Nakanishi Yutaka
Ozawa Motoki
Cermak Kenealy Vaidya & Nakajima LLP
Friedhofer Michael A
Klaus Lisa N
Nakajima Tomoko
Polymatech Co. Ltd.
LandOfFree
Key sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Key sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4116668