Patent ID: 7795732

Claim:
A ceramic wiring board, comprising: a ceramic substrate; and a wiring layer including a wiring part and a connection part formed on the wiring part, the wiring part having a base metal layer, made of at least one selected from Ti, Zr, Hf, Nb, Cr, Ta, Ni, a Ti-based alloy, a Ta-based alloy, and a Ni-based alloy, a first diffusion preventive layer made of at least one selected from Pt, Pd, Ni, a Pt-based alloy, a Pd-based alloy, and a Ni-based alloy and a first Au layer which are stacked in sequence on a surface of the ceramic substrate, and the connection part having a second diffusion preventive layer, made of at least one selected from Pt, Pd, Ni, a Pt-based alloy, a Pd-based alloy, and a Ni-based alloy, a void suppression layer made of Au or an Au—Sn alloy containing 85 mass % or more of Au and a solder layer containing at least Sn which are stacked in sequence, wherein the void suppression layer has a thickness in a range of not less than 30 nm nor more than 500 nm, the first diffusion preventive layer has a thickness in a range of not less than 0.1 μm nor more than 0.4 μm, and the second diffusion preventive layer has a thickness in a range of not less than 0.05 μm nor more than 1 μm.