Ohkuchi Materials Co., Ltd.

Sh Materials Co., Ltd.

Jun Fukuzaki

A lead frame constitutes a product unit in a multi-row lead frame and has a dam bar and a lead connected together. The dam bar has a first site where connection is made with the lead and a second site adjoining the first site without connection with the lead. A predetermined range in the lead near a connecting portion with the dam bar and the second site in the dam bar have a plate thickness smaller than that of the first site having a same plate thickness as a metal plate as a material from which the dam bar and the lead are made.

Lead frame and method for manufacturing the same

A lead frame includes leads including inner leads and outer leads. Each of the leads includes an inner lead and an outer lead. A tie bar extends so as to cross connecting points of the inner leads and the outer leads. The leads and the tie bar include a first surface, a second surface, and side surfaces. A plating layer is provided on the inner leads, the outer leads and the tie bar. A first non-plating region is provided between an edge in the first surface of the inner lead and an edge of the plating layer provided on the first surface of the inner lead. A second non-plating region is provided between an edge of the first surface on the inner lead side of the tie bar and an edge on the inner lead side of the plating layer provided on the first surface of the tie bar.

Growing community of inventors

Kagoshima, Japan

Jun Fukuzaki