M. Morimoto et al., A 1-INCH 2-M PIXEL HDTV CCD IMAGE SENSOR WITH TUNGSTEN PHOTO-SHIELD AND H-CCD SHUNT WIRING, I.E.E.E. transactions on electron devices, 42(1), 1995, pp. 50-57
A 1-inch 2-million pixel FIT-CCD image sensor for HDTV has been develo
ped, which features a tungsten photo-shield and horizontal CCD (H-CCD)
shunt wiring. Tungsten photo-shield, which has low reflectance and go
od step coverage characteristics, reduces smear level to -110 dB, comb
ined with a frame-interline-transfer (FIT) scheme. The tungsten photo-
shield also acts as a shunt busline, supplying transfer pulses to vert
ical CCD (V-CCD) electrodes, so that a 1.2 x 10^5 electron charge hand
ling capability is obtained at a frame transfer frequency of 1 MHz. Ne
wly developed H-CCD shunt wiring suppresses vertical line pair FPN, ev
en with smaller transfer pulse amplitudes. H-CCD shunt wiring also hel
ps reduce power consumption in the H-CCD by 2/3 as compared to that ac
hieved with conventional wiring.