Kovar Laser Package Housing with Selective Gold Plating

Machine a Kovar laser package housing with seal-face flatness at the ±0.005 mm benchmark and apply gold plating only to defined bonding zones.

Full-surface gold would waste precious metal; masking had to protect the Cu–Ni stack function while leaving plating zones within thickness spec.

CNC milling against shared datums, copper/nickel strike, then selective gold plating with a masking layout agreed in DFM.

Method: CMM + XRF plating thickness

Tolerance verified: ±0.005 mm flatness (seal face)

Seal face passed CMM flatness check; plating zones passed thickness verification.