Method of bonding semiconductor substrate and MEMS device
First Claim
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1. A method of bonding a semiconductor substrate, comprising:
- bonding a first semiconductor substrate with a second semiconductor substrate by eutectic bonding with pressurization and heating, an aluminum containing layer primarily made of aluminum and a germanium layer in an overlaid state being interposed between a bonding surface of the first semiconductor substrate and a bonding surface of the second semiconductor substrate;
film-forming the aluminum containing layer on the bonding surface of the second semiconductor substrate and film-forming the germanium layer on the aluminum containing layer;
receding an outer end of the germanium layer inward with respect to an outer end of the aluminum containing layer as to the aluminum containing layer and the germanium layer in the overlaid state; and
broadening a pattern width of the aluminum containing layer than a pattern width of the germanium layer.
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Abstract
A method of bonding a semiconductor substrate has a step of pressurizing and heating to bond a substrate 11 with a substrate 12 by eutectic bonding in a state that an aluminum containing layer 31 and a germanium layer 32 between a bonding section 30a of the substrate 11 and a bonding section 30b of the substrate 21 are overlaid and an outer end 32a of the germanium layer 32 is receded inward with respect to an outer end 31a of the aluminum containing layer 31.
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Citations
19 Claims
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1. A method of bonding a semiconductor substrate, comprising:
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bonding a first semiconductor substrate with a second semiconductor substrate by eutectic bonding with pressurization and heating, an aluminum containing layer primarily made of aluminum and a germanium layer in an overlaid state being interposed between a bonding surface of the first semiconductor substrate and a bonding surface of the second semiconductor substrate; film-forming the aluminum containing layer on the bonding surface of the second semiconductor substrate and film-forming the germanium layer on the aluminum containing layer; receding an outer end of the germanium layer inward with respect to an outer end of the aluminum containing layer as to the aluminum containing layer and the germanium layer in the overlaid state; and broadening a pattern width of the aluminum containing layer than a pattern width of the germanium layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification