Patent ID: 7485202
Filing Date: 2009-02-03
Classification: H01L

Abstract:
1. A method comprising: a) applying a flat-top deposit of a composition onto a first substrate by forcing the composition through a deposition tool having at least one aperture, where the at least one aperture has a perimeter surrounded by sidewalls, where the sidewalls have heights, where the heights are reduced around at least a portion of the perimeter of the apertures on the deposition tool as compared to average height of the deposition tool; b) hardening the flat-top deposit; c) adhering a second substrate to the top of the flat-top deposit, d) optionally repeating steps a), b), and c); where at least one of the first substrate and the second substrate is a semiconductor; where the deposit is applied by stencil printing using a down-step stencil and down-step stencil includes a plurality of apertures, each aperture has an etched area around its trailing edge, and the etched area has a height less than height of the remainder of the stencil.