Dispositif à transfert de charges à grille d'étraînement

PCT No. PCT/FR94/00506 Sec. 371 Date Jan. 5, 1995 Sec. 102(e) Date Jan. 5, 1995 PCT Filed May 3, 1994 PCT Pub. No. WO94/27322 PCT Pub. Date Nov. 24, 1994The invention relates to a charge-coupled device. Such devices comprise at least one insulated conducting gate (3) connecting two semiconductor zones. According to the invention, each insulated conducting gate (3) has a width progressively increasing from the first semiconductor zone (1) to the second semiconductor zone (2). The width of each gate (3) is sufficiently narrow for the potential well created by the application of a voltage V to the gate to have a depth increasing progressively from the first zone (1) to the second zone (2), thus enabling the charges to be driven away. The invention applies to any type of charge-coupled device and particularly to photodiodes.