Abstract: A power steering system includes a pair of wheel steering mechanisms configured to turn a pair of steered wheels of a vehicle, and a coupling mechanism coupling the steered wheels and coupling the wheel steering mechanisms including operating-side and nonoperating-side mechanisms. The operating-side mechanism includes a drive shaft coupled to one end of the coupling mechanism and extending in an axial direction, and a steering operation member engaged with the drive shaft. The nonoperating-side mechanism includes a drive shaft coupled to the other end of the coupling mechanism and extending in an axial direction, and an electric assist device engaged with the drive shaft. The operating-side mechanism includes at least two operating-side stoppers respectively configured to limit right and left turns of the steered wheels. The nonoperating-side mechanism includes at least one nonoperating-side stopper configured to limit any one of right and left turns of the steered wheels.

Abstract: There is provided a resin laminate having a layer construction of a first inorganic material layer/insulating layer/second inorganic material layer or a layer construction of an inorganic material layer/insulating layer, wherein the insulating layer has a multi-layer structure of two or more resin layers of a core insulating layer and an adhesive insulating layer. In this case, the resin laminate has the adhesive insulating layer which can realize optimal etching, is suitable for etching by a wet process, and has excellent adhesion. At least one of the layers constituting the insulating layer is formed of a polyimide resin which comprises repeating units represented by formula (1) and has a glass transition point of 150 to 360° C. and is dissolvable in a basic solution at a rate of more than 3 ?m/min, preferably more than 5 ?m/min, and most preferably more than 8 ?m/min.

Abstract: There is provided a resin laminate having a layer construction of a first inorganic material layer/insulating layer/second inorganic material layer or a layer construction of an inorganic material layer/insulating layer, wherein the insulating layer has a multi-layer structure of two or more resin layers of a core insulating layer and an adhesive insulating layer. In this case, the resin laminate has the adhesive insulating layer which can realize optimal etching, is suitable for etching by a wet process, and has excellent adhesion. At least one of the layers constituting the insulating layer is formed of a polyimide resin which comprises repeating units represented by formula (1) and has a glass transition point of 150 to 360° C. and is dissolvable in a basic solution at a rate of more than 3 ?m/min, preferably more than 5 ?m/min, and most preferably more than 8 ?m/min.

Abstract: A laminate having a layer structure of first inorganic layer-insulating layer-second inorganic layer or inorganic layer-insulating layer, characterized in that the insulating layer comprises two or more resin layers containing a core insulating layer and an adhesive insulating layer, and at least one layer constituting the insulating layer comprises a polyimide resin which has a recurring unit represented by the general formula (1), has a glass transition temperature of 150° C. to 360° C., and exhibits a rate of dissolution in a basic solution of 3 &mgr;/min or more, preferably 5 ?m/min or more, most preferably 8 &mgr;/min or more.