Method for forming a semiconductor device and a semiconductor device formed by the method

CS Gormley (Inventor), A Brown (Inventor), SC Blackstone (Inventor)

Research output: Patent


A method for forming a multi-layer semiconductor device (1) having a lower silicon layer (4), an intermediate silicon layer (5) within which micro-mirrors (10) are formed and an upper spacer layer (6) of silicon for spacing another component from the micro-mirrors (10). First and second etch stop layers (8,9) of oxide act as insulation between the respective layers (4,5,6). In order to minimize damage to the micro-mirrors (10), the formation of the micro-mirrors (10) is left to the end of the forming process. An assembly of the lower layer (4) and the intermediate layer (5) with the first etch stop layer (8) is formed, and the second etch stop layer (9) is then grown and patterned on the intermediate layer (5) for subsequent formation of the micro-mirrors (10). The upper layer (5) is then bonded by an annealing process to the patterned second etch stop layer (9). After the formation of communicating bores (30) in the lower layer (4) and thinning of the first etch stop layer (8) adjacent the micro-mirrors (10) through the communicating bores (30), openings (16) in the upper layer (6) and the micro-mirrors (10) are sequentially formed by reactive ion etching through the upper layer (6). Portions of the first and second etch stop layers (8,9) adjacent the micro-mirrors (10) are then etched away.
Original languageEnglish
Patent number09/661766
Priority date28/09/04
Publication statusPublished (in print/issue) - 14 Sept 2000

Bibliographical note

Country: United States of America
Commercialisation Status: assigned
Patent Application Date: 2000-09-14


Dive into the research topics of 'Method for forming a semiconductor device and a semiconductor device formed by the method'. Together they form a unique fingerprint.

Cite this