Patent ID: 9538582
Date: 2017-01-03
CPC Classifications: B23K,H01L,H05B

Claim:
1. A method comprising: placing a package strip over a vacuum boat, wherein the vacuum boat comprises an air-penetration layer having a hole, an upper base portion, and a lower base portion, and wherein the package strip covers the hole; placing a package component over the package strip, wherein solder regions are disposed between the package strip and the package component; vacuuming the hole, wherein the package strip is pressed by a pressure against the vacuum boat, and wherein the pressure is generated by a vacuum in the hole; when the vacuum in the hole is maintained, reflowing the solder regions to bond the package component to the package strip; and insulating the first package strip from conducting heat to the lower base portion of the vacuum boat, wherein the lower base portion is below, and is vertically spaced apart from the air-penetration layer by a thermal insulation layer, and the thermal insulation layer does not have any hole for conducting air during the vacuuming.