Asm Assembly Materials Ltd.

Asm Technology Singapore Pte Ltd

Yiu Fai Kwan

Tat Chi Chan

Wai Ho Chan

Chi Chung Lee

Yu Lung Lam

Ching Man Tsui

Gio Jose Asumo Villaespin

Hang Ren

Ho Ki Yeung

Chun Ho Yau

A routable electroforming substrate for assembling a semiconductor package is manufactured by providing a carrier and plating a patterned first metallic layer onto the carrier which is configured to function as a surface mount pad or input/output pad in an assembled semiconductor package. A patterned second metallic layer comprising copper is plated over the first metallic layer, and a third metallic layer, which is configured for mounting a plurality of semiconductor dice, is plated over the second metallic layer. The carrier is then removed to expose the first metallic layer.

Routable electroforming substrate comprising removable carrier

A lead frame comprises a substrate comprising copper and includes a layer of bright silver is plated onto the substrate. A layer of doped bright silver is thereafter plated over a top surface of the layer of bright silver for enhancing the performance of LED devices utilizing the lead frame.

Plated lead frame including doped silver layer

A method is provided for treating a leadframe comprising copper or copper alloy to enhance adhesion of molding compound to it. The leadframe is oxidized in an oxidation treatment bath to form copper oxide on the surface of the leadframe. It is then dipped in a complexing or chelating agent to enhance the purity of the copper oxide formed. Thereafter, the leadframe is cleaned with an acid to remove any contaminants remaining on the leadframe.

Leadframe treatment for enhancing adhesion of encapsulant thereto

A process for producing a pre-plated leadframe that has enhanced adhesion by molding compound is provided, wherein a base leadframe material is first plated with multiple layers of metallic material. Thereafter, the plated base leadframe material is covered with a mask, so as to expose selected surfaces thereof at unmasked areas where enhanced adhesion of molding compound is desired. The said unmasked areas are plated with a layer of copper before removing the mask. Optionally, the layer of copper may further be oxidized to form a layer of specially controlled copper oxide.

Pre-plated leadframe having enhanced encapsulation adhesion

A leadframe having a metallic substrate and comprising layers of plated material, and a method of manufacturing said leadframe are provided. The substrate is plated with a layer of oxidizable material comprising nickel and a noble metal is selectively plated on the layer of oxidizable material. Thereafter, an exposed portion of the oxidizable material that is not plated with the noble metal is passivated to enhance adhesion of an encapsulation compound molded to the leadframe.

Growing community of inventors

Hong Kong, China

Yiu Fai Kwan