Patent ID: 8804300
Filing Date: 2014-08-12
Classification: B81B,F04B,H01L

Abstract:
1. A method for forming a pump in an integrated circuit, the method comprising: forming a cavity in a first insulating layer, the upper portion of the first insulating layer located in the vicinity of the cavity forming a border; covering the inside of the cavity all the way to the border and possibly the border with a first conductive layer; forming a first opening of the first conductive layer emerging into a ventilating duct previously formed in the first insulating layer; filling the cavity with a sacrificial portion; covering the sacrificial portion and the portion of the first conductive layer placed above the border with a second insulating layer and with a second conductive layer; forming a small second opening in the second conductive layer and in the second insulating layer; removing the sacrificial portion; and covering the second conductive layer with a third insulating layer to close back the small second opening.