Patent ID: 9704775
Date: 2017-07-11
CPC Classifications: B23K,C22C,H01L,Y10T

Claim:
1. A method for manufacturing a thermal interface sheet, comprising: preparing a first solder region having a quadratic prism shape and being formed from a first solder; immersing the first solder region into a second solder which is melted so as to form a second solder region having a quadratic prism shape around the first solder region; immersing the first solder region and the second solder region into a third solder which is melted so as to form a third solder region having a quadratic prism shape around the second solder region; and cutting the first solder region, the second solder region and the third solder region, wherein a third melting point of the third solder is larger than a second melting point of the second solder and the second melting point is larger than a first melting point of the first solder.