Patent ID: 6441853
Filing Date: 2002-08-27
Classification: H01L

Abstract:
A charge-coupled device (CCD) image sensor comprising:an active area and a field area, said active area receiving therein an array of photodiodes arranged in a two-dimensional matrix; a vertical CCD for transferring therein signal charge transferred from each column of said photodiodes; a horizontal CCD for transferring the signal charge transferred by said vertical CCD; and an output section for detecting the signal charge transferred by said horizontal CCD to output a two-dimensional image, said vertical CCD comprising a transfer channel and a plurality of associated vertical transfer electrodes for receiving a driving signal including a plurality of pulse trains, and field area receiving therein a plurality of bus lines corresponding to said vertical transfer electrodes, said vertical transfer electrodes being formed by a plurality of conductive films including a first layer film, a second layer film and a third layer film, said second layer film covering substantially an entire side wall of said first layer film in said active area, said first layer film protruding from said second and third layer films in said field area.