The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 2025
Filed:
Jun. 01, 2023
Nitto Boseki Co., Ltd., Fukushima, JP;
Hiroyuki Kawanishi, Koriyama, JP;
Kazuaki Minami, Koriyama, JP;
Koichi Nakamura, Koriyama, JP;
Yuichiro Ito, Fukushima, JP;
Hirotaka Ikejiri, Fukushima, JP;
Nitto Boseki Co., Ltd., Fukushima, JP;
Abstract
Provided is a glass cloth that can reduce a delay time difference of a printed wiring board and for which high productivity can be achieved. In the glass cloth, a glass filament diameter of the warp yarn and the weft yarn is from 0.5 to 4.5 μm, the filament number of each is from 150 to 3000, the weaving density of each is from 1.0 to 50.0 filaments/25 mm, the average yarn width of each is from 550 to 10000 μm, the fiber-opening efficiency coefficient of each is from 0.600 to 1.500, the ratio of the filament number to the filament diameter is from 68.6 to 555.5, the geometric mean of the opening efficiency coefficients of the warp yarn and the weft yarn is from 0.770 to 1.200, and the thickness of the glass cloth is less than 10.0 μm.