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Methods of manufacture MEMS devices

  • US 9,266,719 B2
  • Filed: 02/27/2012
  • Issued: 02/23/2016
  • Est. Priority Date: 01/11/2008
  • Status: Expired due to Fees
First Claim
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1. A method of forming a micro-electromechanical system (MEMS) device, the method comprising:

  • forming a buried oxide layer over a substrate;

    forming a first semiconductive material over the buried oxide layer;

    forming at least one trench in the first semiconductive material and the buried oxide layer, the at least one trench comprising a first sidewall and a second sidewall opposite the first sidewall;

    forming an insulating material layer over at least a portion of the first sidewall of the at least one trench, wherein the insulating material layer is not an air gap;

    forming a second semiconductive material within the at least one trench; and

    forming a first gap in an upper portion of the at least one trench, the first gap being formed between the second semiconductive material and the second sidewall of the at least one trench in the first semiconductive material.

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