| 摘要 |
PURPOSE:To avoid the difference between outputs at dark and to improve the S/N ratio, by providing the entirely same opening as the effective picture element section of a photo diode of an optical black section for aluminum light shield and covering the optical black section only with a light shield filter. CONSTITUTION:The figure shows a cross section of an optical black section, an aluminum 13 on a photo diode 1 is removed with selective removal at the photo resist process and has the same construction as that of the effective picture element section. Under a transparent glass base 14 of the filter, a light shield substance 15 is provided to form an optical black section. Thus, the optical black section is taken as the same construction as the effective picture element section, then a signal output at dark has no difference for the effective picture element section and the optical black section, allowing to obtain stable picture with good SN ratio. |
