Method for manufacturing microfabrication apparatus
First Claim
1. A method for manufacturing a microfabrication apparatus comprising steps of:
- forming a mask pattern by providing a trench or a gap deeper than a desired functional material layer within a semiconductor layer;
depositing the functional material layer in a manner to be thinner than the semiconductor layer; and
obtaining a pattern of the functional material layer by removing the mask pattern.
1 Assignment
0 Petitions
Accused Products
Abstract
To offer a microstructure fabrication apparatus capable of realizing MEMS and a Rugate Filter excellent in performance characteristics by patterning a thick functional material film in high aspect ratio with a simple and practical manufacturing method. A Si layer is employed for a mask pattern. The advantages of the Si layer are withstood a process conducted at high temperature for forming a PZT layer, which is the functional material layer, patterned in high aspect ratio, and achieves excellent process consistency for the whole manufacturing processes of the microfabrication. A trench or a gap is formed with the mask pattern deeper than the desired PZT layer. The PZT layer, or functional material layer (films) is formed on the whole surface including the bottom of the concave part of the mask pattern. The PZT layer deposited on the mask pattern is removed with the mask pattern itself, and selectively remains the pattern of the PZT layer, thereby obtaining a pattern of the desired functional material layer.
-
Citations
13 Claims
-
1. A method for manufacturing a microfabrication apparatus comprising steps of:
-
forming a mask pattern by providing a trench or a gap deeper than a desired functional material layer within a semiconductor layer;
depositing the functional material layer in a manner to be thinner than the semiconductor layer; and
obtaining a pattern of the functional material layer by removing the mask pattern. - View Dependent Claims (2, 3, 4, 5, 6)
bonding the silicon substrate on another substrate with an anodix oxidation method;
wherein the silicon substrate is employed as the semiconductor layer.
-
-
3. A method for manufacturing a microfabrication apparatus according to claim 1, wherein a silicon portion of a SOI substrate is employed as the semiconductor layer.
-
4. A method for manufacturing a microfabrication apparatus according to claim 1, wherein the functional material layer is deposited with a gas deposition method.
-
5. A method for manufacturing a microfabrication apparatus according to claim 1, wherein the mask pattern is formed by a dry etching method using SF6 gas and C4F8 gas.
-
6. A method for manufacturing a microfabrication apparatus according to claim 1, wherein the mask pattern is selectively removed with XeF2 or BrF3.
-
7. A method for manufacturing a microfabrication apparatus comprising steps of:
-
forming a mask pattern by coating a surface of a photoresist layer with a cap film after a trench or a gap deeper than a desired functional material layer is provided within the photoresist layer;
depositing the functional material layer in a manner to be thinner than the photoresist layer at least in the trench or the gap of the mask pattern; and
obtaining a pattern made of the functional material layer by removing the mask pattern. - View Dependent Claims (8)
-
-
9. A method for manufacturing a microfabrication apparatus comprising steps of:
-
forming a mask pattern by providing a trench or a gap deeper than a desired functional material layer within an organic compound film;
depositing the functional material layer in a manner to be thinner than the organic compound film at least in the trench or the gap of the mask pattern; and
obtaining a pattern of the functional material layer by removing the mask pattern. - View Dependent Claims (10, 11, 12, 13)
-
Specification