Multi depth substrate fabrication processes
First Claim
1. A method of fabricating microstructures on a substrate, comprising the following steps in the order named:
- a) providing a substrate having a first surface and a first resist layer disposed thereon;
b) exposing first selected regions of the first resist layer to an environment that renders the first resist layer more soluble in a developer solution;
c) developing the first resist layer in the developer solution to expose first selected regions of the first surface;
d) exposing second selected regions of the resist layer to an environment that renders the resist layer more soluble in the developer solution;
e) etching the first selected regions of the first surface;
f) developing the first resist layer to expose second selected regions of the first surface; and
g) etching the first and second selected regions of the first surface.
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Accused Products
Abstract
Method of fabricating microstructures on a substrate. The method comprises providing a substrate layer having a first surface with a resist layer. First selected regions of the resist layer are exposed to an environment that renders the resist layer more or less soluble in a developer solution. The resist layer is then developed in the developer solution to expose selected regions of the substrate surface. Second selected regions of the resist layer are then exposed to an environment that renders the resist layer more or less soluble in the developer solution by aligning exposure of the second selected regions to the first selected regions. The first selected regions of the substrate surface are etched. Second selected regions of the resist layer are then developed to expose the second selected regions of the substrate surface.
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Citations
14 Claims
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1. A method of fabricating microstructures on a substrate, comprising the following steps in the order named:
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a) providing a substrate having a first surface and a first resist layer disposed thereon;
b) exposing first selected regions of the first resist layer to an environment that renders the first resist layer more soluble in a developer solution;
c) developing the first resist layer in the developer solution to expose first selected regions of the first surface;
d) exposing second selected regions of the resist layer to an environment that renders the resist layer more soluble in the developer solution;
e) etching the first selected regions of the first surface;
f) developing the first resist layer to expose second selected regions of the first surface; and
g) etching the first and second selected regions of the first surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification