Abstract: A semiconductor device of the present invention includes: a base material (5); a semiconductor element (2) mounted on the base material (5); a solder resist (11a) covering a prescribed region of the base material (5); and a molding resin body (3) integrally covering the semiconductor element (2) and a part of the solder resist (11a). The solder resist (11a) has a recessed portion (16) at the bottom of the outer circumference of the molding resin body (3). The molding resin body (3) is partially embedded in the recessed portion (16).

Abstract: A single lens element used for converting a divergent pencil of rays, radiated from a light source, into a predetermined convergent state, wherein the single lens element is made from a resin and has a positive optical power due to a refraction effect and a positive optical power due to a diffraction effect, the diffraction effect is based on a diffraction structure formed on at least one of an incident side surface and an exit side surface of the single lens element, and the following expressions are satisfied: 0.1<NA<0.3 0.4<T/f<0.75 2.2<fr/f<3 here, f is a focal length of the entire single lens element, fr is a focal length due to the refraction effect of the single lens element, T is a thickness of the single lens element on an optical axis, and NA is a numerical aperture of a single lens element at an incident side.

Abstract: A single lens element used for converting a divergent pencil of rays, radiated from a light source, into a predetermined convergent state, wherein the single lens element is made from a resin and has a positive optical power due to a refraction effect and a positive optical power due to a diffraction effect, the diffraction effect is based on a diffraction structure formed on at least one of an incident side surface and an exit side surface of the single lens element, and the following expressions are satisfied: 0.1<NA<0.3 0.4<T/f<0.75 2.2<fr/f<3 here, f is a focal length of the entire single lens element, fr is a focal length due to the refraction effect of the single lens element, T is a thickness of the single lens element on an optical axis, and NA is a numerical aperture of a single lens element at an incident side.

Abstract: In a vertical-type molding apparatus, bolts are piercingly provided at symmetrically opposed four locations in a stamper replacement unit and a fixed mold stacked together. These bolts are fastened by a single lever which is operated externally of the mold, whereby the stamper replacement unit is fixed to the fixed mold.

Abstract: In a vertical-type molding apparatus, bolts are piercingly provided at symmetrically opposed four locations in a stamper replacement unit and a fixed mold stacked together. These bolts are fastened by a single lever which is operated externally of the mold, whereby the stamper replacement unit is fixed to the fixed mold.