摘要:
A resin composition comprises a polyimide resin composition or precursor thereof obtained from an acid dianhydride component containing a compound represented by the following Formula (1) and a diamine component containing a diamine compound represented by the following Formula (2), and a bismaleimide compound represented by the following Formula (3), wherein the diamine component contains a diamine compound (a) in which m in the Formula (2) represents an integer of 0 or 1 and a diamine component (b) in which m in the Formula (2) represents an integer of 2 to 6 in a molar ratio (a:b) of from 100:0 to 50:50, wherein, in the Formula (2), when m is 2 or more, each X may be independently the same or different, and represents O, SO2, S, CO, CH2, C(CH3)2, C(CF3)2 or a direct bond, wherein, in the Formula (3), n represents an integer of 0 to 6.
摘要:
A resin composition comprises a polyimide resin composition or precursor thereof obtained from an acid dianhydride component containing a compound represented by the following Formula (1) and a diamine component containing a diamine compound represented by the following Formula (2), and a bismaleimide compound represented by the following Formula (3), wherein the diamine component contains a diamine compound (a) in which m in the Formula (2) represents an integer of 0 or 1 and a diamine component (b) in which m in the Formula (2) represents an integer of 2 to 6 in a molar ratio (a:b) of from 100:0 to 50:50, wherein, in the Formula (2), when m is 2 or more, each X may be independently the same or different, and represents O, SO2, S, CO, CH2, C(CH3)2, C(CF3)2 or a direct bond, wherein, in the Formula (3), n represents an integer of 0 to 6.
摘要:
Disclosed is a polyimide metal laminate having a metal layer with high adhesiveness. This polyimide metal laminate is suitable as a material for high-density circuit boards. Specifically disclosed is a polyimide film characterized by being surface-treated with an aqueous solution containing an alcohol amine and an alkali metal hydroxide. Also specifically disclosed is a polyimide metal laminate obtained by providing the surface of such a polyimide film with a thermoplastic polyimide and then forming a metal layer on the outer side of the thermoplastic polyimide layer. Further specifically disclosed is a method for manufacturing such a polyimide metal laminate.
摘要:
The present invention relates to a polyimide-metal laminate that ensures a high adhesion of a metal layer and suitable for use as a material of a high density circuit board. In particular, it provides a polyimide film characterized by having undergone a surface treatment with an alkaline aqueous solution containing a permanganate. The alkaline aqueous solution preferably contains a hydroxide. It also provides a polyimide-metal laminate characterized in that on a surface of the polyimide film a thermoplastic polyimide layer and a metal layer are formed, and a method of producing the polyimide-metal laminate.
摘要:
A semiconductor laser device has a stacked structure formed on a main surface of a substrate (1) and including an MQW active layer (5) made of a group-III nitride semiconductor. The stacked structure has a stripe-shaped waveguide formed on a main surface thereof. One of opposing facets of the waveguide is a light emitting facet. A first region having a forbidden band width Eg1 in the MQW active layer (5), and a second region located adjacent to the first region and having a forbidden band width Eg2 in the MQW active layer (5) (where Eg2≠Eg1) are formed around the recess (2). The waveguide is formed so as to include the first region and the second region, and so as not to include the stepped region. The light emitting facet is formed in one (5a) of the first region and the second region, which has a shorter light absorption wavelength.
摘要:
A glass substrate is cleaned by contacting a preliminarily polished glass surface with functional water having a positive ORP potential for a predetermined period of time in the last rinsing step in order to repair the structure of the glass so as to achieve higher surface hardness and improved corrosion resistance.
摘要:
In a thin-film transistor to be used in an active matrix liquid crystal display device, each of a gate signal line, a source signal line, and a drain extraction electrode has a three-layer structure. Specifically, each of these members is made up of a lower layer made of a titanium film, an intermediate layer made of an aluminum film, and an upper layer made of a titanium film containing nitrogen. Since the respective upper layers, in contact with a gate insulating film or an interlayer insulating film made of a silicon nitride film, are made of titanium films containing nitrogen, they have superior adhesion to the silicon nitride film. Consequently, film peeling, etc. during the manufacturing process can be suppressed. Further, providing the titanium film beneath the aluminum film contributes to reduction of the resistance of the aluminum film.
摘要:
A semiconductor laser device includes a semiconductor-layer lamination (20) having an active layer (26) formed over a substrate (11). The semiconductor-layer lamination (20) includes a front face which emits light, a strip-shaped optical waveguide formed in a direction transverse to the front face, a first region (20A) extending in a direction transverse to the front face, a second region (20B) having a top surface whose height is different from that of the first region (20A), and a planar region (20C) formed between the first region (20A) and the second region (20B), and having periodic surface undulations whose variation is smaller than that of the second region (20B). The optical waveguide is formed in the planar region (20C).
摘要:
In a thin-film transistor to be used in an active matrix liquid crystal display device, each of a gate signal line, a source signal line, and a drain extraction electrode has a three-layer structure. Specifically, each of these members is made up of a lower layer made of a titanium film, an intermediate layer made of an aluminum film, and an upper layer made of a titanium film containing nitrogen. Since the respective upper layers, in contact with a gate insulating film or an interlayer insulating film made of a silicon nitride film, are made of titanium films containing nitrogen, they have superior adhesion to the silicon nitride film. Consequently, film peeling, etc. during the manufacturing process can be suppressed. Further, providing the titanium film beneath the aluminum film contributes to reduction of the resistance of the aluminum film.
摘要:
An internal combustion engine has an exhaust system and an oxygen sensor fitted to the exhaust system including a sensor element and an electrically powered heater for heating the sensor element. A method is disclosed for controlling the power supplied to said heater by restricting it to be less than a predetermined value. This restriction may be done by controlling the value of a relatively steady current flowing through said heater, or alternatively may be done by supplying an intermittent voltage to said heater and by controlling the duty factor of said intermittent voltage. The power supplied to said heater may be determined by detecting the current flowing through said heater, or may be determined by detecting the voltage across said heater and the current flowing through said heater. Thereby, during engine heating up operation, the temperature of the heater element is raised as quickly as practicable, without any risk of over quick heating of the heater occurring, which might lead to damage thereto. Accordingly it is ensured that engine performance and the quality of exhaust gas emissions at the time of such engine warming up operation are good. A system is also described for implementing this method.