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The Simulation of Thermomechanically Induced Stress in Plastic Encapsulated IC Packages (Hardcover, 1999 ed.) Loot Price: R2,963
Discovery Miles 29 630
The Simulation of Thermomechanically Induced Stress in Plastic Encapsulated IC Packages (Hardcover, 1999 ed.): Gerard Kelly

The Simulation of Thermomechanically Induced Stress in Plastic Encapsulated IC Packages (Hardcover, 1999 ed.)

Gerard Kelly

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Loot Price R2,963 Discovery Miles 29 630 | Repayment Terms: R278 pm x 12*

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This book is motivated by the need to understand and predict the complex stress distributions, transfer mechanisms, warpage, and potential failures arising from the encapsulation of devices in plastic. Failures like delaminations, package cracking, and metal shift occur due to the build-up of residual stress and warpage in the packages because of the TCE mismatch between the package materials as the package cools from its molding temperature to room temperature. The correct use of finite element tools for these problems is emphasised. F.E. techniques are used to predict the internal package stress distribution and help explain the stress transfer mechanism between the die, die paddle, and plastic after molding. Out-of-plane shear stress components are shown to be responsible for experimentally observed metal shift patterns on the die surface. Delaminations dramatically alter the internal stress state within a package, increasing the tensile stress in the plastic and so the likelihood of plastic cracks, the stress on wire bonds, and the incidence of wire bond failure. The application of F.E. techniques to predict the post-mold warpage of both thermally enhanced PQFPs and TQFPs is described. Simulations of a thermally enhanced PQFP warpage based on standard modelling assumptions alone fail to predict either the magnitude or its direction correctly. The modelling assumptions need to be modified to include the chemical shrinkage of the molding compound to enable accurate predictions of package warpage to be made, particularly when the packages are asymmetric in structure. Microsystem packaging in both plastic and 3D package body styles is reviewed. Although microsystem packaging is derivedfrom IC packaging, additional requirements for microsystems, not common to IC packaging are highlighted. The assembly stresses on a novel microsystem, incorporating a micromachined silicon membrane pump integrated into a 3D plastic encapsulated vertical multichip module package (MCM-V), are analysed.

General

Imprint: Springer
Country of origin: Netherlands
Release date: 2001
First published: 1999
Authors: Gerard Kelly
Dimensions: 244 x 170 x 11mm (L x W x T)
Format: Hardcover
Pages: 134
Edition: 1999 ed.
ISBN-13: 978-0-7923-8485-4
Categories: Books > Professional & Technical > Industrial chemistry & manufacturing technologies > General
Books > Professional & Technical > Electronics & communications engineering > Electronics engineering > Circuits & components
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LSN: 0-7923-8485-7
Barcode: 9780792384854

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