Patent ID: 8941442
Filing Date: 2015-01-27
Classification: G04F,Y10T

Abstract:
1. A method of fabricating one or more vapor cells, the method comprising: forming one or more vapor cell dies in a first wafer having an interior surface region and a perimeter, the first wafer having a first diameter; anodically bonding a second wafer to a first side of the first wafer over the vapor cell dies, the second wafer having a second diameter; positioning a third wafer over the vapor cell dies on a second side of the first wafer opposite from the second wafer, the third wafer having a third diameter; placing a sacrificial wafer over the third wafer, the sacrificial wafer having a diameter that is larger than the first, second and third diameters; locating a metallized bond plate over the sacrificial wafer; and anodically bonding the third wafer to the second side of the first wafer when a voltage is applied to the metallized bond plate while the sacrificial wafer is in place.