Intel Pentium 4 Processor 478-Pin Socket (mPGA478) Design Guidelines

Intel® Pentium® 4 Processor 478-Pin Socket (mPGA478)

1. Introduction

1.1. Objective

This document defines a surface mount, ZIF (Zero Insertion Force) socket intended for performance and

value desktop platforms based on future Intel microprocessors. The socket provides I\O, power and ground

contacts. The 478 socket contacts with a cavity in the center of the socket. The socket has solder balls/surface

mount features for surface mounting with the motherboard. The mPGA478 socket contacts have 50mil pitch

with regular pin array, to mate with a 478-pin processor package.

1.2. Purpose

To define functional, quality, reliability, and material (that is, visual, dimensional and physical) requirements

and design guidelines mPGA478 Socket in order to develop a low cost, low risk, robust, HVM (High Volume

Manufacturable) socket solution available from multiple sources.

1.3. Scope

This design guideline applies to all mPGA478 sockets purchased to the requirements of this design guideline.