Patent ID: 7944956
Filing Date: 2011-05-17
Classification: H01L,H01S

Abstract:
1. A laser stack apparatus comprising a first heat sink, a second heat sink, a first semiconductor laser element, and a second semiconductor laser element, wherein each of the first heat sink and the second heat sink comprising: wherein the first semiconductor laser element is located between the upper surface of the second flat plate of the first heat sink and a lower surface of the first flat plate of the second heat sink and has a coefficient of thermal expansion lower than the first coefficient of thermal expansion, wherein the second semiconductor laser element is mounted on the upper surface of the second flat plate of the second heat sink and has a coefficient of thermal expansion lower than the first coefficient of thermal expansion, wherein the first flat plate has a thermal conductivity higher than the partition plate, wherein the first flat plate and the second flat plate are comprised of Cu, and wherein the partition plate is comprised of one of Ni, Au, W, Pt, and stainless steel.