Patent ID: 8796058

Claim:
A method comprising: forming one or more metrology structure, during formation of a device in a chip area; venting the one or more metrology structure after formation of the device; forming at least one of an insulator and conductor material over the sacrificial material and the one or more metrology structure; forming at least one vent hole in the at least one of insulator and conductor material to expose the sacrificial material and the one or more metrology structure; and sealing the at least one vent hole over the vented sacrificial material after the venting, wherein: the one or more metrology structure and sacrificial material are vented through the at least one vent hole; the device is a Micro-Electro-Mechanical System (MEMS) structure, and the one or more metrology structure is formed simultaneously with the sacrificial material used to form one or more cavities of the MEMS structure.