Putting Buried Resistors Into Your Printed Circuit Boards
Book
Description
The increasing density and performance of today's electronic products
are requiring new solutions. Amongst the solutions is to use resistors
integrated into the printed circuit board. Using integrated resistors
offers to the designer the choice of designing a resistor either on the
surface or buried internally within the layers of a printed circuit board.
The resultant resistor is very thin and flat, and what we call planar.
This entire approach transforms a typical printed board from being strictly
attachment and interconnect medium to containing integral resistors.
Using buried resistors is not something new or has been just developed. The technology was first developed in 1972, over a quarter century ago. The origin of these types of resistors can be traced back to the hybrid circuit industry. Since the time of the development of planar buried resistors they have been used to solve engineering problems on designs, particularly for high speed circuitry, such as ECL and GaAs, and now for high-density TTL/CMOS products such as the Pentium 4™ by Intel where there are a high concentration of resistors and precious little real estate.
Who Will Benefit
This book will be of immense value to both circuit designers as well as
CAD designers, and those involved in product testing, fabrication, troubleshooting
and debug of high-speed products.
Table of Contents
Chapter 1 - INTRODUCTION TO BURIED RESISTORS
- Introduction
- Advantages
Chapter 2 - APPLICATIONS FOR BURIED RESISTORS
- Uses of Planar Resistor Technology
- Examples of Uses
Chapter 3 - MATERIAL PROCESS AND CHARACTERISTICS
- Setup Considerations
- Material Construction
- Sheet Resistance
- Resistor Conductor Material Electrical Specifications
- Temperature Effects
- Power Dissipation
- Processing Sequence and Guidelines
- Material and Purchase Specifications
Chapter 4 - DESIGN CONSIDERATIONS
- Incorporating Resistors into a Printed Circuit Board
- Film Requirements
- Resistor Correction Factors for Artwork
- Connections to Planes
- Element Transition and Overlap Area
- Resistor Shapes & Construction
- Resistor Parameters for Calculations
- Via Restrictions for Resistors
- Resistive Material Corner Effects
- Trimming Options
- Resistor Shapes
- CAD Libraries
Chapter 5 - RELIABILITY
- Long Term Reliability
- ECL Test Circuit Test Results
Chapter 6 - VENDORS
- Vendor List
Author: James C. Blankenhorn
Edition: July 2001
Pages: full colour 82 pages 8.5" x 11"
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