Title:
HEAT SINK
Document Type and Number:
Japanese Patent JP2019067981
Kind Code:
A
Abstract:
To provide a heat sink capable of restraining acceleration of deterioration, while realizing efficient cooling.SOLUTION: A heat sink 2 includes a coolant passage 20. The coolant passage 20 includes a first passage part 23 and a second passage part 24 extending in a first direction D1, a third passage part 25 extending in a second direction D2, and a bent part 26 connecting the third passage part 25 and the second passage part 24. Since the depth D25 of the third passage part 25 is shallower than the depths D23, D24 of the first and second passage parts 23, 24, cross-sectional area S25 of the third passage part 25 is smaller than the cross-sectional areas S23, S24 of the first and second passage parts 23, 24. The bent part 26 includes a shallow region 26A extending from a position, corresponding to the side end 25r of the third passage part 25 in the first direction D1 toward the second passage part 24, and having a depth D26a shallower than that of the second passage part 24.SELECTED DRAWING: Figure 4
Inventors:
KAGEYAMA NOBUTO
MORITA TAKENORI
UCHIYAMA TAKAYUKI
MORITA TAKENORI
UCHIYAMA TAKAYUKI
Application Number:
JP2017193636A
Publication Date:
April 25, 2019
Filing Date:
October 03, 2017
Export Citation:
Assignee:
HAMAMATSU PHOTONICS KK
International Classes:
H01L23/473; H01S5/024; H05K7/20
Domestic Patent References:
| JP2013012591A | 2013-01-17 | |||
| JPH042156A | 1992-01-07 | |||
| JP2014187170A | 2014-10-02 |
Foreign References:
| US6480514B1 | 2002-11-12 | |||
| CN102097401A | 2011-06-15 | |||
| WO2004076952A1 | 2004-09-10 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Kenichi Shibayama
Yoshiki Kuroki
Kenichi Shibayama