Abstract: A polymer containing a structural unit including an aromatic hydroxy group bonded to a main chain, where the aromatic hydroxy group is protected by an acid-labile group represented by the following formula (ALU-1) and is deprotected by action of an acid to become alkali-soluble. This provides: a polymer that makes it possible to form a resist film with which it is possible to form a pattern having extremely high isolated space resolution, small LER, and excellent rectangularity, effects of development loading and residue defects being suppressed, and the pattern having etching resistance and suppressed pattern collapse in the produced resist pattern; a chemically amplified positive resist composition containing the polymer; a resist patterning process using the chemically amplified positive resist composition; and a mask blank including the chemically amplified positive resist composition.

Abstract: A chemically amplified positive resist composition is provided comprising a polymer comprising units containing a phenolic hydroxy group and units containing a phenolic hydroxy group protected with an acid labile group, in which a carbon atom neighboring the carbon atom to which the phenolic hydroxy group protected with an acid labile group is attached is substituted with a specific group. A resist pattern with a high resolution, reduced LER, rectangularity, minimized influence of develop loading, and few development residue defects can be formed.

Abstract: A chemically amplified positive resist composition comprising (A) a base polymer, (B) a photoacid generator, and (C) a quencher is provided. The base polymer (A) contains a polymer comprising phenolic hydroxy group-containing units, aromatic ring-containing units, and units containing a phenolic hydroxy group protected with an acid labile group. The photoacid generator (B) and the quencher (C) are present in a weight ratio (B)/(C) of less than 3/1. The resist composition exhibits a very high isolated-space resolution and forms a pattern with reduced LER, rectangularity, minimized influences of develop loading and residue defects.

Abstract: A vehicle rail fixed to a vehicle floor for relatively movably supporting a movable rail fixed to a seat includes a bottom wall member having a drawing portion at which the vehicle rail is fixed to the vehicle floor, and a guide member provided in a standing manner at both sides of the bottom wall member in a width direction for guiding a movement of the movable rail, the guide member being integrally formed with the bottom wall member by means of welding.

Abstract: A vehicle rail fixed to a vehicle floor for relatively movably supporting a movable rail fixed to a seat includes a bottom wall member having a drawing portion at which the vehicle rail is fixed to the vehicle floor, and a guide member provided in a standing manner at both sides of the bottom wall member in a width direction for guiding a movement of the movable rail, the guide member being integrally formed with the bottom wall member by means of welding.

Abstract: A door frame for a vehicle includes a lower frame for guiding an up/down movement of a window glass, a main frame connected to the lower frame for determining a top dead center of the window glass, and a bracket for attaching a door mirror secured to the lower frame and the main frame, the bracket having a bottom portion and a pair of opposing side wall portions extended from both sides of the bottom portion, and each having a thickness thicker than that of the bottom portion.

Abstract: A method for manufacturing a vehicle door frame including an elongated member formed with a plurality of bending portions in longitudinal direction of the elongated member and having a hollowed main body, a connecting portion extending from the hollowed main body and a flange portion extending from the connecting portion comprises the steps of: an elongated member forming step for forming the elongated member at which the hollowed main body, the connecting portion and the flange portion are formed integrally; a liner inserting step for inserting a liner into the hollowed main body; a slit forming step for forming a slit at the connecting portion; a bending portion forming step for forming a bending portion; a notch portion forming step for forming a notch portion by trimming off a part of the flange portion and the connecting portion, and a vehicle door frame finishing step for finishing the vehicle door frame by fixing a bracket into the notch portion.

Abstract: A door frame for a vehicle comprises a frame structure portion including a hollow portion having a hollow cross section extending in longitudinal direction and a flange portion extending from the outer profile of the hollow portion and an outer surface portion engaged with the flange portion to be integrally formed with the frame structure portion, wherein the frame structure portion and the outer surface portion are formed by separate different plate members, and the outer surface portion is bended and engaged with the frame structure portion to be integrated together. The plate member of the outer surface portion is thicker than the plate member of the frame structure portion. A material of the plate of the outer surface portion is different from a material of the frame structure portion.

Abstract: A door frame for a vehicle comprises a frame structure portion including a hollow portion having a hollow cross section extending in longitudinal direction and a flange portion extending from the outer profile of the hollow portion and an outer surface portion engaged with the flange portion to be integrally formed with the frame structure portion, wherein the frame structure portion and the outer surface portion are formed by separate different plate members, and the outer surface portion is bended and engaged with the frame structure portion to be integrated together. The plate member of the outer surface portion is thicker than the plate member of the frame structure portion. A material of the plate of the outer surface portion is different from a material of the frame structure portion.