Charge coupled F.E.T. devices (C.C.F.E.T.)

A charge coupled F.E.T. array is described which gives an amplified, non-destructive measure of the size of the charge packet under each electrode of a CCD line. The basic concept uses the fact that the surface potential and consequently the depth of the depletion layer under any electrode of a CCD line is sensitive to the size of the Charge packet under that electrode. As a result, an integral array of F.E.T´s can be formed simply by changing the electrode structure of one of the phases. Results from a four bit surface channel device in an n-type layer on a p-type substrate are used to illustrate the basic properties of the device.