Toyo Advanced Technologies Co., Ltd.

Kabushiki Kaisha Pilot Corporation

Yuki Nitta

Tatsuyuki Nakatani

Keishi Okamoto

Satoru Ando

Hiroki Nikawa

Takumi Kajiwara

Yoshinori Abe

Akira Mochizuki

Kouichi Takayama

Hirotaka Masuda

Seichiyou Makihira

Yuichi Mine

Kunihiro Toyota

An implant material includes: a base material; and a carbonaceous filmprovided on a surface of the base material. The carbonaceous filmincludes carbon atoms, oxygen atoms, and nitrogen atoms in a surface thereof, and the carbon atoms are bonded to the oxygen atoms to form carboxyl carbon and carbon having a single bond with oxygen. In the surface of the carbonaceous film, a content of nitrogen atoms is greater than or equal to 8.0 at. %, a content of carbon having a single bond with oxygen is greater than or equal to 5.4%, and a content of carboxyl carbon is less than or equal to 3.1%.

Implant material

A method for manufacturing an implant material includes preparing a base material for implant, removing moisture from a chamber in which the base material is placed, and introducing material gas as a carbon source and a silicon source into the chamber after the removal of the moisture to form a carbon thin film containing a C&#x2014;C component in which carbon atoms are bonded, and a SiC component in which carbon and silicon atoms are bonded on a surface of the base material by ionized deposition.

Method for manufacturing an implant material

A ballpoint pen tip includes a ball and a ball holder for rotatably holding the ball. The ball includes a ball body and a first carbonaceous film formed so as to cover a surface of the ball body. The first carbonaceous film has carbon atoms and oxygen atoms bonded to some of the carbon atoms. The ratio of carbon atoms bonded to oxygen atoms to the total carbon atoms at a surface of the first carbonaceous film is equal to or greater than 0.1.

Ballpoint pen tip and ballpoint pen

Growing community of inventors

Hiroshima, Japan

Yuki Nitta