Abstract: An optical transmitter according to one embodiment includes: a plurality of light emitting elements; a plurality of light receiving elements that monitor output lights from the respective plurality of light emitting elements; a housing that mounts the plurality of light emitting elements and the plurality of light receiving elements; and a wiring board which is mounted on the housing and which is provided with a first region having a pad electrically connected to the light emitting element and a second region disposed at a position lower than the first region and having a pad electrically connected to the light receiving element.

Abstract: To provide an adhesive layer-equipped transparent plate, which satisfies both visibility and impact resistance, and which is suitable for protection of an in-vehicle display device. The adhesive layer-equipped transparent plate according to the present invention comprises a transparent plate and an adhesive layer provided on one surface of the transparent plate. The transparent plate is a plate glass having a plate thickness of from 0.4 to 3.0 mm. The adhesive layer has a storage shear modulus of at most 30 MPa at a temperature of 25° C. and at a frequency of 1 Hz, a storage shear modulus of at least 50 MPa at a temperature of 25° C. and at a frequency of 40 kHz, and a loss tangent tan? of at least 0.1 at a temperature of 25° C. and at a frequency of 40 kHz.

Abstract: To provide a process for producing a fluorocarbon film, which is capable of constantly forming a fluorocarbon film excellent in durability and functionality. The process for producing a fluorocarbon film of the present invention is a process for producing a fluorocarbon film at least a part of which is chemically bonded to a substrate surface, and is characterized by conducting, in sequence, step (a) for applying plasma to a substrate surface in a continuous or pulse manner to form active points on the substrate surface and step (b) for applying plasma to the substrate surface in a continuous or pulse manner in the presence of a gas of a fluorocompound represented by the formula CxFy and/or CxFyOz under such a condition that active species impinge on the substrate surface at a relatively lower collision energy than in step (a).

Abstract: A tetrafluoroethylene-ethylene copolymer (ETFE) film, wherein polar groups are present on the surface of the film after a surface treatment, and the surface roughness Ra is at most the surface roughness Ra of the surface of an untreated film; an ETFE film, wherein polar groups are present on the surface of the film after a surface treatment, and the amount of a weak boundary layer is at most one time of the amount of a weak boundary layer on the surface of an untreated film; a laminate employing such a film having an extremely excellent bonding strength; and a process for producing it with a mass production property.

Abstract: A tetrafluoroethylene-ethylene copolymer (ETFE) film, wherein polar groups are present on the surface of the film after a surface treatment, and the surface roughness Ra is at most the surface roughness Ra of the surface of an untreated film; an ETFE film, wherein polar groups are present on the surface of the film after a surface treatment, and the amount of a weak boundary layer is at most one time of the amount of a weak boundary layer on the surface of an untreated film; a laminate employing such a film having an extremely excellent bonding strength; and a process for producing it with a mass production property.