Fishing – trapping – and vermin destroying
Patent
1994-04-22
1995-02-28
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
437190, 437192, H01L 2144, H01L 2148
Patent
active
053937007
ABSTRACT:
A method, and resultant structure, for manufacturing large highly reflective metal reflector plates on an integrated circuit chip, for applications in game chips or similar virtual image projection systems, is described. A metal interconnection layer is formed above a semiconductor substrate, an intermetal dielectric layer is formed on the metal interconnection layer, and an opening is made through the intermetal dielectric layer to expose a portion of the metal interconnection layer. A first metal layer is formed on the intermetal dielectric layer and connecting to the metal interconnection layer through the opening. A second metal layer is formed on the first metal layer. A third metal layer is formed on the second metal layer. A highly reflective metal layer is formed on the third metal layer. The the first, second, third and highly reflective metal layers are patterned to form the highly reflective metal reflector plate. A passivation layer is formed over the highly reflective metal reflector plate and exposed surface of the intermetal dielectric layer. The passivation layer is etched above the highly reflective metal reflector plate to leave a portion of the passivation layer over the entire top surface of the highly reflective metal reflector plate. The portion of the passivation layer is removed with a wet etch, to expose the highly reflective metal reflector plate.
REFERENCES:
patent: 4603258 (1986-07-01), Sher et al.
patent: 4720908 (1988-01-01), Wills
patent: 5225372 (1993-07-01), Savkar et al.
patent: 5270255 (1993-12-01), Wong
IEEE Spectrum, Oct. 1993, pp. 22-40, "Special Report-Virtual Reality is For Real".
Ackerman Stephen B.
Chartered Semiconductor Manufacturing Pte Ltd.
Chaudhuri Olik
Everhart C.
Saile George O.
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