Usta Co., Ltd.

Nan Ya Plastics Corporation

Other

Chi-Lin Chen

Te-Chao Liao

Hung-Yi Chang

Hao-Sheng Chen

Meng-Huai Han

A modified bismaleimide resin, a method for preparing the same, a prepreg, a copper clad laminate, and a printed circuit board are provided. The modified bismaleimide resin is formed by reacting a diamine having a specific structure with maleic anhydride, and has greater amounts of non-polar and hydrophobic groups in the molecular structure thereof.

Modified bismaleimide resin, method for preparing the same, prepreg, copper clad laminate and printed circuit board

A method of calculating a dielectric constant and a dielectric loss of a polymer material including the following steps is provided: providing a polymer having an optimized molecular geometry; analyzing a dipole moment autocorrelation function of the polymer having the optimized molecular geometry; fitting the dipole moment autocorrelation function of the polymer having the optimized molecular geometry via a relaxation function to obtain a corresponding fitting function; calculating a static permittivity of the polymer having the optimized molecular geometry; and obtaining a complex permittivity spectrum via the fitting function and the static permittivity, so as to calculate a corresponding dielectric constant and dielectric loss of the polymer having the optimized molecular geometry.

Method of calculating dielectric constant and dielectric loss of polymer material

A lamp reflector includes a body including a plurality of sheets; a plurality of heat sinks connecting the sheets to form a corn shape; and a plurality of light emitting modules disposed on a surface of the heat sink in such a manner that the light emitting modules face an inner space of the body, wherein each of the light emitting modules includes: a substrate fixed to the surface; and a plurality of light emitting diodes disposed on the substrate and electrically connected to each other by the substrate.

LED lamp having reflector with high heat dissipation rate

A LED lamp assembly includes a rectangular electrical box formed of two symmetrical U-shaped frame panels that are detachably fastened together by a tongue-and-groove joint and holding therein a control circuit board that is affixed to two parallel mounting grooves in one U-shaped frame panel by screw nails, a back cover plate and a bracket affixed to the electrical box at two opposite sides for mounting, and an elongated, rectangular light source unit affixed to the bracket and controllable by the control circuit board to emit light.

LED lamp assembly

A LED lamp assembly for use in a long passage includes an elongated rectangular housing carrying multiple power-output electric connectors, a power-input electric connector and a power switch, a flat rectangular light source having a light-emitting face and selectively fastened to a rectangular top end of housing in one of four angular positions that spaced from one another at 90&#xb0; angle, and a mounting plate extending perpendicularly from one side of the rectangular end wall of the housing having a plurality a plurality of equiangularly spaced and smoothly arched mounting slots for mounting.

LED lamp assembly for use in a long passage

LED lamp

An improved structure of portable quartz lamp with a lamp housing having a handle and a central post therebeneath, which has between a stand and the central post a connecting piece having a hollowed interior and has an upper and a lower axial pipe portions, the upper one is threadably connected with the central post, and the lower one has its bottom end supported on a top surface of the stand and connected with a bolt thereunder; power conductors are connected in such a way that they will not be tangled with one another when in adjustment of light intensity; the rear surface of the connecting piece has a case for shielding the adjusting mechanism; the adjustment can therefore be effected unafraid of rain infiltration.

Growing community of inventors

Taipei, Taiwan

Chi-Lin Chen