Patent ID: 8420445
Filing Date: 2013-04-16
Classification: H01L

Abstract:
1. A method for packing of components on wafer surfaces, comprising: connecting a first side of a first wafer to a first side of a second wafer, wherein at least one of the first and second wafers has a plurality of active components on the first side and wherein at least one of the first and second wafers has depressions extending on the first side so that the depressions form channels along a connecting surface region to cavities in the first and/or second wafers, the cavities at least partially surrounding the plurality of active components; dividing the first wafer into a plurality of parts by making trenches in a second side of the first wafer opposite to the first side, the plurality of parts being separated from one another by the trenches, but being connected mechanically to one another by the second wafer, wherein the connecting surface region between the first and second wafer is laterally exposed in the trenches so that the channels open laterally into the trenches; applying a coating to regions of the trenches in which the connecting surface region is exposed to cover the channels; and wherein dividing the first wafer into the plurality of parts by making the trenches takes place prior to connecting the first and second wafers.