US 12,002,723 B2
Sealing lid formed from translucent material
Hiroyuki Kusamori, Hiratsuka (JP); Tomohiro Shimada, Hiratsuka (JP); Takeshi Iribe, Hiratsuka (JP); Noriyuki Kudo, Tokyo (JP); and Katsunao Tanaka, Tokyo (JP)
Assigned to TANAKA KIKINZOKU KOGYO K.K., Tokyo (JP)
Appl. No. 16/967,207
Filed by TANAKA KIKINZOKU KOGYO K.K., Tokyo (JP)
PCT Filed Feb. 12, 2019, PCT No. PCT/JP2019/004772
§ 371(c)(1), (2) Date Aug. 4, 2020,
PCT Pub. No. WO2019/159858, PCT Pub. Date Aug. 22, 2019.
Claims priority of application No. 2018-023249 (JP), filed on Feb. 13, 2018.
Prior Publication US 2020/0365474 A1, Nov. 19, 2020
Int. Cl. H01L 21/00 (2006.01); B23K 1/00 (2006.01); B23K 35/30 (2006.01); H01L 23/06 (2006.01)
CPC H01L 23/06 (2013.01) [B23K 1/0016 (2013.01); B23K 35/30 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sealing lid that is joinable to a package main body containing an optical element and that is for producing a package hermetically sealed, the sealing lid comprising a lid main body comprising a translucent material comprising one of glass, crystal, sapphire, silicon and germanium,
wherein the package main body consists of a metal or a ceramic,
wherein the lid main body comprises a joining region having a frame shape corresponding to an outer circumferential shape of the lid main body, the joining region being formed on a surface of the lid main body that is to be joined to the package main body,
wherein a plurality of pieces of brazing material comprising a eutectic alloy are fused on the joining region of the lid main body, and
wherein a material structure of a random cross section of the plurality of pieces of brazing material consisting of (a) a eutectic structure and (b) a single phase having an equivalent circle diameter of equal to or less than 5 μm.