| 摘要 |
<p>PURPOSE:To intercept external light, by burying the second metallic layer in the interlayer insulating layer between a poly Si layer and the first metallic layer. CONSTITUTION:PSG24 is stacked on a conductive poly Si layer 22 in an IC device for liquid crystal panel as an interlayer insulating film for the first layer, and a connecting hole is made. Next, Al 25 is made at the place except the vicinity of the hole for shade and the hole is again opened by stacking PSG26. Al video signal wiring 27 and a liquid crystal driving electrode 28 are formed on the PSG26. By said constitution, even if the light applied to the surface leaks from the opening section 29 of Al wiring 27, 28, the light is intercepted by a buried Al layer 25 and does not reach a semiconductor substrate 18. Therefore, no light leakage current is generated, and a normal picture will be displayed.</p> |
