Patent ID: 6130149
Filing Date: 2000-10-10
Classification: C23C,H01L,Y10S

Abstract:
An aluminum bump process comprising the steps of:providing a silicon substrate having a composite passivation layer covering a top metal layer;forming a composite dielectric layer over said passivation layer;said composite dielectric layer further comprising a spin-on-glass (SOG) layer and a plasma enhanced oxide (PEOX) layer;forming an opening through said composite dielectric layer and through said passivation layer to expose a portion of said top metal layer;forming a bump metal over said substrate covering said portion of said top metal layer in said opening;forming a hard-mask over said bump metal;patterning said hard-mask over said bump metal;etching through said hard-mask to form a metal bump in the underlying said bump metal; andremoving said composite dielectric layer over said passivation layer.