公开(公告)号：US20230002867A1

公开(公告)日：2023-01-05

申请号：US17781617

申请日：2020-12-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akitoshi KASAHARA ,  Naoki KOHYAMA ,  Tomohiro KANAZAWA ,  Kenshi TSUJI ,  Yoshiyuki KITA ,  Atsushi SHIMADA ,  Yuuki SASAGAWA

IPC: C22C27/04

Abstract: A metal wire, which is one of a tungsten wire and a tungsten alloy wire, includes alkali metal on the surface thereof. The amount of alkali metal is at most 2.0 μg per 1 g of the metal wire.

公开(公告)号：US20250146108A1

公开(公告)日：2025-05-08

申请号：US18835442

申请日：2022-12-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro KANAZAWA ,  Akitoshi KASAHARA ,  Yui NAKAI ,  Masanobu MATSUSHIMA

IPC: C22C27/04 ,  D03D15/573 ,  D03D15/67

Abstract: A tungsten wire includes: a metal wire that contains tungsten as a major component; and an oxide film that covers a surface of the metal wire. An average thickness of the oxide film is at least 4 nm and at most 13 nm. A tensile strength of the tungsten wire is at least 3500 MPa.