Electronics and Telecommunications Research Institute

Yong Goo Yoo

Woo Seok Cheong

Eun Kyoung Kim

Mun Cheol Paek

Ho Jun Ryu

Sung Q Lee

Kang Ho Park

Doo Hee Cho

Ki Chul Kim

Jeong Dae Suh

Jae Kwang Lee

Provided is a small form factor optical/magnetic disk including an integrated metal hub and a disk plate. The integrated metal hub includes a circular upper metal hub and a circular lower metal hub integrally formed with and disposed under the upper metal hub. The circular lower metal hub has a smaller diameter smaller than the upper metal hub. A central hole is formed in central portions of the upper and lower metal hubs and passes through the upper and lower metal hubs. The disk plate has a through-hole that is formed in a central portion and is directly associated with the integrated metal hub, and a recess that is formed around the through-hole and allows the upper metal hub to be mounted therein. Since the central portion of the small form factor optical/magnetic disk is not thick, the small form factor optical/magnetic disk can contribute to an ultra thin small form factor information storage device. Also, since manufacturing processes are simple, price and quality competitiveness can be enhanced.

Small form factor optical/magnetic disk for information storage

Provided is a form factor disk such as an optical or magnetic disk used in electronic appliances and information appliances. The form factor disk includes: a circular plate having a first hole for inserting a rotational shaft, a plurality of second holes formed adjacent to the first hole, and an information storage region formed at a surface thereof; an upper metal hub located on the circular plate, and having a hole aligned with the first hole of the circular plate and column-shaped joints formed at portions corresponding to the second holes of the circular plate; and a lower metal hub located under the circular plate, and having a hole aligned with the first hole of the circular plate and column-shaped joints formed at portions corresponding to the second holes of the circular plate, wherein the joints of the upper and lower metal hubs are jointed through the second holes.

Form factor disk

Provided is an apparatus and method of initializing a recording layer used in manufacturing a phase-change optical disk for storing information. The optical disk is initialized using a UV lamp in order to initialize the recording layer of the phase-change optical disk capable of repeatedly writing information, without a separate optical head, whereby it is possible to increase productivity by remarkably reducing an initialization time of the optical disk since a large area is initialized using a UV beam.

Apparatus and method of initializing phase-change optical disk

Provided is a method of manufacturing a thin film magnetic head. In particular, a method of manufacturing a thin film magnetic head is provided in which a flow process of a photoresist is applied to separate a hard magnetic layer and a metal multi-layer and a photoresist is used to insulate an upper electrode from a lower electrode in manufacturing a magnetic reproduction device, thereby simplifying and optimizing a manufacturing process and significantly reducing a manufacturing time.

Method of manufacturing thin film magnetic head

Growing community of inventors

Daejeon, South Korea

Yong Goo Yoo