4507 results about "Solder paste" patented technology

A chip carrier for a semiconductor chip is provided. A plurality of solder pads for bump soldering are formed on a chip mounting surface of the chip carrier, to allow a flip chip to be mounted and electrically connected to the chip carrier. A solder mask layer is formed on the chip carrier, wherein a plurality of openings are provided in the solder mask layer to expose the solder pads, and an outwardly opening extended portion is formed respectively from the openings corresponding to the solder pads having a relatively narrower pitch therebetween, so as to prevent formation of voids during an underfill process for filing a gap between the flip chip and the chip carrier.

This specification describes techniques for manufacturing an electronic system module. The module includes flexible multi-layer interconnection circuits with trace widths of 5 microns or less. A glass panel manufacturing facility, similar to those employed for making liquid crystal display, LCD, panels is used to fabricate the interconnection circuits. A polymer base layer is formed on a glass carrier with an intermediate release layer. Alternate layers of metal and dielectric are formed on the base layer, and patterned to create an array of multi-layer interconnection circuits on the glass panel. A thick layer of polymer is deposited on the interconnection circuit, and openings formed at input / output (I / O) pad locations. Solder paste is deposited in the openings to form wells filled with solder. After dicing the glass carrier to form separated interconnection circuits, IC chips are stud bumped and assembled using flip chip bonding, wherein the stud bumps on the components are inserted into corresponding wells on the interconnection circuits. The IC chips are tested and reworked to form tested circuit assemblies. Methods for connecting to testers and to other modules and electronic systems are described. Module packaging layers are provided for hermetic sealing and for electromagnetic shielding. A blade server embodiment is also described.

An electrical connection device comprises a socket, a plurality of electrical conducting holder in between, a contact ring and a plurality of solder balls. A plurality of pin holes are placed on the socket to provide the insert function for the pins of a IC package. The electrical conducting holder is placed in the pin holes and comprises an extensional part, a holder on the top of the extension part and a solder pad on the bottom part of the extension part to combine the solder ball. At least one 2D or 3D geometrical structure such as the hole, the convex and concave part or the slope on the bottom surface of the solder pad is formed. The geometrical structure will make the bottom surface of the solder pad not the flat plane. With the geometrical structure and the contact ring, the contact area of the solder pad and the contact ring will be enlarged during the solder reflow process. The coupling effect will be better and meanwhile improve the characteristics of the electricity, the intensity of the structure, the production yield and the characteristics of the co-planarity.

A leadless semiconductor package mainly includes a semiconductor device securely attached to an upper surface of a die pad by solder paste and a plurality of leads arranged about the periphery of the die pad. The thickness of the leads and the die pad are within a range of 10 to 20 mils. The semiconductor device is electrically coupled to one of the leads. A package body is formed over the semiconductor device and the leads in a manner that the lower surfaces of the die pad and the leads are exposed through the package body. Preferably, the first semiconductor device is electrically coupled to one of the leads by at least one heavy gauge aluminum wire. The present invention further provides a method of producing the semiconductor package described above.

The present invention provides a system and method that mounts integrated circuit devices onto substrates and a system and method for employing the method in stacked modules. The contact pads of a packaged integrated circuit device are substantially exposed. A solder paste that includes higher temperature solder paste alloy is applied to a substrate or to the integrated circuit device to be mounted. The integrated circuit device is positioned to contact the contacts of the substrate. Heat is applied to create high temperature joints between the contacts of the substrate and the integrated circuit device resulting in a device-substrate assembly with high temperature joints. The formed joints are less subject to re-melting in subsequent processing steps. The method may be employed in devising stacked module constructions such as those disclosed herein as preferred embodiments in accordance with the invention. Typically, the created joints are low in profile.

A stacked die package includes a substrate or interposer board that includes a contact area on a top surface and landing pads surrounding the contact area. Solder pads are disposed on an opposite side of the substrate. The solder pads are electrically connected with the landing pads by inner board wiring. A reconstituted die, which includes a die surrounded by a frame, is mounted over the substrate. A top die is mounted over the reconstituted die. Both the reconstituted die and the top die are electrically connected to the substrate, e.g., by wire bonds.

A light emitting element is die-bonded to a portion of a lead frame exposed at the bottom of an opening formed at a top face of a resin package. A reflector to direct light emitted from the light emitting element towards a predetermined direction is attached to the top face of the resin package. Lead terminals are arranged so as to protrude from two opposite side regions of the resin package. A predetermined lead terminal among the plurality of lead terminals, connected to a portion where the light emitting element is die-bonded, is bent upwards, and soldered to the reflector by solder paste.

A printed wiring board including solder pads excellent in frequency characteristic is provided. To do so, each solder pad 73 is formed by providing a single tin layer 74 on a conductor circuit 158 or a via 160. Therefore, a signal propagation rate can be increased, as compared with a printed wiring board of the prior art on which two metal layers are formed. In addition, due to lack of nickel layers, manufacturing cost can be decreased and electric characteristics can be enhanced.