Micron Technology Incorporated

Round Rock Research, LLC

Micro Technology, Inc.

Brad D Rumsey

Todd O Bolken

Patrick W Tandy

Matt E Schwab

Stephen L James

David J Corisis

Cary J Baerlocher

Joseph M Brand

Edward A Schrock

Steven G Thummel

Stephen F Moxham

Brenton L Dickey

Steven R Stephenson

Dana A Stoddard

Joseph C Young

Richard W Wensel

Willam J Reeder

William Jeffery Reeder

A method and apparatus for improving the laminate performance of the solder balls in a BGA package. Specifically, the ball pads on the substrate are configured to increase the shear force necessary to cause delamination of the solder balls. Conductive traces extending planarly from the pads and arranged in specified configurations will increase the shear strength of the pad.

Solder ball landpad design to improve laminate performance

A method for a fiducial and pin one indicator that utilizes a single solder resist opening in a die mounting substrate to perform the combined functions of prior art fiducials and pin one indicators. Methods of fabricating a carrier substrate and fabricating a semiconductor device package using the combination pin one indicator and alignment fiducial are also described.

Method of making a semiconductor device having an opening in a solder mask

A multilayer circuit board includes a base layer, a conductive layer and a soldermask. The soldermask layer has two sets of openings. One of the openings are vent openings, that expose the base layer to provide ventilation so that gases may escape during processing. The second openings expose selective regions of a conductor layer. The multi-layer circuit board provides for less occurrences of delamination.

Soldermask opening to prevent delamination

The present invention features a novel design for a fiducial and pin one indicator that utilizes a single solder resist opening in a die mounting substrate to perform the combined functions of prior art fiducials and pin one indicators. Methods of fabricating a carrier substrate and fabricating a semiconductor device package using the combination pin one indicator and alignment fiducial of the present invention are also provided.

The present invention relates to the marking and identification of defective die sites on a mounting substrate. A mounting substrate is provided which is inspected and tested for visual and electrical defects. Information relating to the functionality and/or various defects of one or more die sites is then encoded in the form of a designator placed on the substrate. The information encoded on the designator may then be read or scanned by, for example, computer-driven video equipment and used in a die-attach process to discriminately place semiconductor dice only on known good die sites. Embodiments of the designator include information encoded in the form of a bar code, a series of identifying marks, a strip of magnetic tape or a computerized map of a mounting substrate. Correlated data regarding die site functionality can then be electronically transferred to a die-bonding apparatus.

Descriptor for identifying a defective die site

A method for forming a fiducial and pin one indicator that utilizes a single solder resist opening in a die mounting substrate to perform the combined functions of prior art fiducials and pin one indicators. Methods of fabricating a carrier substrate using the combination pin one indicator and alignment fiducial are also described.

Fabricating a carrier substrate by using a solder resist opening as a combination pin one indicator and fiducial

Method for identifying a defective die site

A solder mask defined bond pad or a non-solder mask defined bond pad may be configured to center the solder over the bond pad using either surface attractive forces or capillary action. In some embodiments, a stub trace may be provided, for example, in opposition to the real trace to provide a capillary counter-attractive force on the solder. In other embodiments, the surface attractive action of the edge of the solder mask may be utilized to center the solder. In still other embodiments, the natural attractive force of a trace on solder may be utilized to appropriately position solder where desired, for example, to line up with other solder deposits.

Positioning flowable solder for bonding integrated circuit elements

The present invention features a novel design for forming a fiducial and pin one indicator that utilizes a single solder resist opening in a die mounting substrate to perform the combined functions of prior art fiducials and pin one indicators. Methods of fabricating a carrier substrate and fabricating a semiconductor device package using the combination pin one indicator and alignment fiducial of the present invention are also provided.

Solder resist opening to define a combination pin one indicator and fiducial

Method of fabricating a semiconductor device package

A system and method for encapsulating an integrated circuit package. More specifically, a system and method for encapsulating a board-on-chip package is described. A strip of material is disposed on one end of the slot in the substrate to control the flow of the molding compound during the encapsulation process.

Growing community of inventors

Meridian, ID, United States of America

Brad D Rumsey