US 12,426,211 B2
Heat sink and heat sink production method
Takumi Nakamura, Tokyo (JP); Kazuhiro Kuwahara, Shizuoka (JP); Yasushi Takagi, Shizuoka (JP); and Hitoshi Iisaka, Shizuoka (JP)
Assigned to NIPPON LIGHT METAL COMPANY, LTD., Tokyo (JP)
Appl. No. 18/559,410
Filed by NIPPON LIGHT METAL COMPANY, LTD., Tokyo (JP)
PCT Filed Mar. 14, 2022, PCT No. PCT/JP2022/011240
§ 371(c)(1), (2) Date Nov. 7, 2023,
PCT Pub. No. WO2022/239451, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 2021-079493 (JP), filed on May 10, 2021.
Prior Publication US 2024/0244795 A1, Jul. 18, 2024
Int. Cl. F28F 7/00 (2006.01); H05K 7/20 (2006.01)
CPC H05K 7/2039 (2013.01) 15 Claims
OG exemplary drawing
 
1. A heat sink comprising:
a plate-shaped base;
a plurality of pin fins separately standing on the base; and
a plurality of slits located between the plurality of pin fins to separate the plurality of pin fins, wherein
the slits includes
a plurality of first slits arranged to be straight on the base and
a plurality of second slits arranged to be straight on the base and intersecting the first slits,
each pin fin includes a pin-fin lower portion being continuous with and standing on the base and a pin-fin upper portion being continuous with and extending from the pin-fin lower portion, and
slit widths of the first slits and the second slits, the slit widths corresponding to the pin-fin upper portions, are greater than slit widths of the first slits and the second slits, the slit widths corresponding to the pin-fin lower portion.