Patent ID: 6146543
Filing Date: 2000-11-14
Classification: B81B

Abstract:
A method of fabricating a microbellows actuator membrane, comprising:obtaining a support substrate;growing a support substrate protectant layer on said support substrate;first depositing a first sacrificial layer on top of said support substrate protectant layer;second depositing a first structural layer on top of said first sacrificial layer;third depositing a second sacrificial layer on top of said first structural layer;patterning said second sacrificial layer to open a contact window between said first structural layer and a second structural layer;fourth depositing said second structural layer on top of said second sacrificial layer;patterning said second structural layer;fifth depositing a third sacrificial layer on top of said second structural layer;patterning said third sacrificial layer;sixth depositing a third structural layer on top of said third sacrificial layer;patterning said third structural layer;etching a back side of said support substrate and a portion of said support substrate protectant layer forming an opening;immersing said support substrate with said first, second, third sacrificial layers and said first, second, third structural layers in an etchant;removing said first, second, third sacrificial layer thereby releasing the microbellows actuator membrane.