Tatsuta Electric Wire & Cable Co., Ltd.
|Tatsuta Electric Wire & Cable Co., Ltd. Patent applications|
|Patent application number||Title||Published|
|20150250080||SHIELD FILM AND SHIELD PRINTED WIRING BOARD - Provided are: a shield film having excellent shield characteristics in the high frequency region of the shield film; and a shield printed wiring board. A shield film (||09-03-2015|
|20140138126||METHOD OF MANUFACTURING MULTILAYER PRINTED WIRING BOARD AND MULTILAYER WIRING BOARD OBTAINED THEREBY - In a method of manufacturing a multilayer board, including: a drilling step for forming a via hole through a pre-preg by laser beam machining, a step of filling the via hole with conductive paste containing a resin component and metal powder, and a step of arranging copper layers or copper layer portions of patterned boards on and under the filled conductive paste and pressing the same, a multilayer printed wiring board superior in conductivity and long-term stability is obtained by using alloying paste as the conductive paste in which at least part of the metal powder is melted and the metal powders adjacent to each other are alloyed, using a pre-preg having a ratio A/B of at least 10 before subjected to preheating, where A is a storage modulus at an inflection point where the storage modulus changes from increasing to decreasing and B is a storage modulus at an inflection point where the storage modulus changes from decreasing to increasing in a temperature profile rising from 60° C. to 200° C., and preheating the pre-preg before the drilling step to reduce the ratio A/B to below 10.||05-22-2014|
|20120128296||THREE-WAVELENGTH OPTICAL MULTIPLEXER - Disclosed is a three-wavelength optical multiplexer which is compact, and which multiplexes light having different wavelength incident to three single-mode optical fibers, particularly light of red, green, and blue at transmittance above a certain reference. Specifically disclosed is a three-wavelength optical multiplexer (||05-24-2012|
|20100238539||OPTICAL SIGNAL AMPLIFYING APPARATUS - An optical signal amplifying apparatus feeding back surrounding light to perform negative feedback optical amplification of a semiconductor optical amplifier is provided that enables a coupling structure to be simplified and miniaturized between the semiconductor optical amplifier and an optical fiber transmitting the output light from the semiconductor optical amplifier by using a fiber grating device. Since a first optical fiber grating device FGD||09-23-2010|
Patent applications by Tatsuta Electric Wire & Cable Co., Ltd.