Patent ID: 6954294
Filing Date: 2005-10-11
Classification: G02B

Abstract:
1. Method of manufacturing a tunable filter comprising: the steps of forming a first optical multilayer film on a first substrate; forming a first sacrificial layer on said first optical multilayer film; forming a second optical multilayer film on said first sacrificial layer; forming a first spring portion that connects said second optical multilayer film and said first substrate; removing said first sacrificial layer by etching thus to form a gap between said first and said second optical multilayer films; forming a fourth optical multilayer film on a second substrate; forming a second sacrificial layer on said fourth optical multilayer film; forming a third optical multilayer film on said second sacrificial layer; forming a second spring portion that connects said third optical multilayer film and said second substrate; removing said second sacrificial layer by etching thus to form a gap between said third and said fourth optical multilayer films; and combining said first substrate and said second substrate with a clearance between said second optical multilayer film and said third optical multilayer film; and providing a first driving device between said first and said second optical multilayer films; providing a second driving device between said third and said fourth optical multilayer films; and providing a third driving device between said first and said second substrates.