Abstract: A substrate inspection device successively stacks a first electrode plate, a standard substrate, a second electrode plate, a sample substrate, and a third electrode plate, in that order, with the sample substrate and the standard substrate placed in symmetrical opposition. A network analyzer both measures the propagation characteristics of RF electromagnetic waves from the second electrode plate to the first electrode plate as standard characteristics and measures the propagation characteristics of RF electromagnetic waves from the second electrode plate to the third electrode plate as the test characteristics. The quality of the sample substrate can be determined by comparing the measured standard characteristics with the test characteristics, thereby enabling, for example, the simple detection of defects inside a multilayer sample substrate.

Abstract: A photosensitive member for electrophotography having excellent electrophotographic characteristics such as chargeability, photosensitivity and dark attenuation, excellent corona resistance and excellent durability, which comprises an electrically conductive support and a photosensitive layer containing a resin binder and particles of a photoconductive phthalocyanine compound dispersed in said binder, said photosensitive layer containing at least one member selected from the group consisting of an electron acceptive material, a coupling agent, an antioxidant and a hydroxyl group-containing polymer.

Abstract: Disclosed here is a panel structure for a large size display which utilizes the gas discharge panel called the surface discharge type panel. Among a pair of substrates arranged face to face in order to define the gas discharge space, the one substrate which is used as the electrode supporting substrate is composed of the composite substrate body where plurality of small size substrates which can be produced comparatively easily with high production yield are combined in such a form that the side edge surfaces of said substrates are aligned face to face, while the other substrate which is used as the covering substrate is composed of a large size single substrate in such a size same as said composite substrate body. Such substrate structure realizes a large size gas discharge panel having a high production yield, without requiring the large scale production facility.