chip scale packaging

Chip scale package

A chip scale package (CSP) (sometimes, chip-scale package with a hyphen) is a type of integrated circuit chip carrier.

Originally, CSP was the acronym for Chip Size Packaging. As only a few packages are chip size, the meaning of the acronym was adapted to Chip Scale Packaging. According to IPC’s standard J-STD-012, "Implementation of Flip Chip and Chip Scale Technology", in order to qualify as chip scale, the package must have an area no greater than 1.2 times that of the die and it must be a single-die, direct surface mountable package. Another criterion that is often applied to qualify these packages as CSPs is that their ball pitch should be no more than 1 mm.

The concept was first proposed by Junichi Kasai of Fujitsu and Gen Mukarami of Hitachi Cable. The first concept demonstration however came from Mitsubishi Electric.

The die may be mounted on an interposer upon which pads or balls are formed, as in flip chip ball grid array (BGA) packaging, or the pads may be etched or printed directly onto the silicon wafer, resulting in a package very close to the size of the silicon die: such a package is called a wafer level chip scale package (WL-CSP) or a wafer level package (WLP).

Types of chip scale packages

Chip scale packages can be classified into the following groups: 1. Customized Leadframe based CSP 2. Flexible substrate based CSP 3. Rigid substrate based CSP and 4. Wafer-Level redistribution CSP (WL-CSP)

External links

Search another word or see chip scale packagingon Dictionary | Thesaurus |Spanish
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature