| 摘要 |
PROBLEM TO BE SOLVED: To prevent a molten brazing filler metal from flowing out on the disc surface more than required by forming a first metal layer entirely on the opposite sides of an insulating board, forming a nickel layer thereon and forming an insular metal island further thereon. SOLUTION: A molybdenum/manganese layer 5 is formed, by deposition or sputtering, on an insulating disc board 4 made of alumina nitride and a nickel layer 6 is formed on the entire surface thereof by deposition or sputtering. Furthermore, a metal island region 2 comprising a nickel layer 7 and a gold layer 8 is formed thereon by deposition or sputtering using a grid mask. According to the method, flow out of brazing filter metal can be suppressed and a region for bonding a gold wire can be ensured without requiring any special blocking region. |
