Patent ID: 7562444

Claim:
A method of manufacturing a cooling assembly for a heat producing electronic component, comprising, providing a cold plate of electrically conductive and thermally conductive and fusible material having a lower surface adapted to be thermally bonded to said electronic component and a planar upper surface, forming an pattern of alternating, substantially parallel micro fins and channels of said cold plate upper surface having co planar upper edges, providing a manifold-cover having a series of substantially parallel, alternating inlet-outlet channels having co planar lower edges capable of being oriented over said micro fin upper edges in a crossing pattern, providing a thin perimeter welding seam on one of said cold plate and manifold-cover said sufficiently thin to melt when a suitable electric current is applied thereto, said welding seam being engagable with a planar surface on the other of said manifold-cover and cold plate when said cold plate and manifold cover are temporarily clamped together so as to surround said crossing pattern and having a pre determined height that maintains said manifold channel lower edges and micro fin upper edges axially spaced apart by less than said pre determined height, temporarily clamping said manifold-cover and cold plate together with a constant clamping force sufficient to maintain said welding seam engaged, applying an electric current across said clamped manifold-cover and cold plate of sufficient strength and for a sufficient time to melt said welding seam until said axial gap closes under said clamping pressure and said micro fin upper edges engage said manifold channel lower edges, thereby creating a sealed flow pattern space between said manifold channels and micro fins.