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Preface |
The Assembly (Jisso) technology is a technology that covers a
wide range from semiconductor packages to assembly of a mother board that contains printed
wiring board(s) (PWB) mounted with various electronic and mechanical components. The assembly
technology is the key technology to produce a product of very small and of lightweight together
with a full range of complicated and sophisticated functions. The assembly technology includes
development of PWB appropriate for specific applications, of relevant electronic and mechanical
components, of interconnections, and of quality and reliability assessment of both components
and products. A change in one field of technology inevitably affects application technology of
other components. An engineer must preferably be aware of all the development being made not
only to the products of his/her immediate interest but also to other peripheral technologies as
to be able to respond to challenges he/she will face to in future.
Efforts have been made to describe various aspects of assembly
technology from basics (components, mounting technology, interconnections, and PWB) using many
illustrations to help understand from the foundation of the technology. The author wishes that
he will have another chance to write an article on the aspects of technologies not covered in
this book though not directly related to assembly but in various other ways such as
environment-friendly technologies and recycling.
This book is prepared as "Purinto-ban Juku (Prep School for PWB)-
An Introduction to Assembly Technology for New Engineers", one of the series of publications
of "Purinto-ban Juku", published by JPCA as introductory books to PWB related technologies for
people with limited knowledge of the technology. Readers are encouraged to read other books
of this series to deepen understanding the technology.
PWB business in Japan is facing severe competition of both
domestic and overseas manufacturers. It should be necessary to have thorough knowledge of
assembly technology to cope with various requests from customers and to vitalize the industry.
The author does hope that this book is of value in enrichment of the understanding of the
technology for new comers to the industry and to refresh knowledge for those working in
production lines.
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Contents |
1. What is Jisso?
1.1 Jisso Technology
1.2 A Short Review of Assembly Process in Electronic Products
1.3 Forms of Packaging
1.3.1 Vacuum Tube Receiver
1.3.2 Logic Circuit Assembly
1.3.3 Leaded Components
1.3.4 Assembly of Surface Mount Devices (SMDs)
2. Component Assembly
2.1 Leaded Components
2.1.1 Resistor
2.1.2 Capacitor
2.1.3 Inductance (coil, transformer)
2.1.4 Semiconductor Device
2.2 Mechanical Component
2.2.1 Connector
2.2.2 Switch
2.2.3 Fuse
2.2.4 Relay
2.3 Surface Mount Device
2.3.1 Chip resistors
2.3.2 Chip Capacitors
2.3.3 Things to be noted on assembly
2.4 Automatic Insertion Machine
2.4.1 Reference hole
2.4.2 Mounting of polar type components
2.4.3 Mounting of leaded components
3. Interconnection (Soldering)
3.1 Soldering materials
3.1.1 Solder
3.1.2 Base material
3.1.3 Flux
3.2 Soldering
3.2.1 Hand soldering
3.2.2 Flow soldering
3.2.3 Reflow soldering
3.3 Types of soldering equipment
3.3.1 Hand soldering
3.3.2 Flow soldering
3.3.3 Reflow soldering
3.4 Defects in soldering
3.4.1 Examples of soldering failure of leaded components (hand soldering, flow soldering)
3.4.2 Examples of soldering failure of SMTs (reflow soldering)
3.4.3 Cases of soldering failures in the market
4. Printed Wiring Board (PWB)
4.1 Types of PWB
4.1.1 Single-sided PWB
4.1.2 Double-sided PWB
4.1.3 Multilayer PWB
4.1.4 Flexible PWB
4.1.5 Flex-rigid PWB
4.1.6 Metal-core PWB
4.2 Materials and specifications of PWB
4.2.1 Types of Copper Clad Laminate (CCL)
4.2.2 Copper foil
4.2.3 Laminated boards
4.2.4 Copper Clad Laminate
4.3 Drilling and routing
4.3.1 Drilling and routing using die and punch
4.3.2 Drilling and routing using router bit
4.4 Features required to PWB
4.4.1 Mounting of components on PWB
4.4.2 Electrical and mechanical connection of components and conductor(s) on PWB
4.4.3 Interconnectivity between components
4.4.4 Requirements to PWB for capability of mounting in a housing and for repair
4.5 Jisso (Assembly) Design - Pattern Design
4.6 Requirements to PWB in the world and board supply
5. Reliability
5.1 Copper Clad Laminate (CCL)
5.2 PWB
5.3 Reliability related to assembly (jisso) technique
6. Jisso in coming years
6.1 Assembly technology
6.2 Semiconductor technology
6.3 Environmental Issues
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