Patent ID: 6130010
Filing Date: 2000-10-10
Classification: B81C,G01P,H01L

Abstract:
A composite structure comprising:a {100} crystal orientation silicon substrate; anda mask member disposed on the silicon substrate for preventing a predetermined area of the silicon substrate from being etched in an anisotropic etching process by entirely covering the predetermined area, the mask member comprising:a main portion having approximately the same shape as that of the predetermined area of the silicon substrate and having a corner having a right angle, the corner being defined by a first main portion side and a second main portion side; anda form-compensation portion formed at the corner of the main portion and having a generally rectangular shape with a first form-compensation side, a second form-compensation side longer than the first form-compensation side and perpendicular to the first form-compensation side, and third and fourth form-compensation sides respectively parallel to each of the first and second form-compensation sides and respectively passing through each of the first and second main portion sides;wherein one of the first and second form-compensation portion sides is parallel to a <011> direction of the silicon substrate.