AS 2546.3-1988

1 - AS 2546.3-1988 PRINTED BOARDS - DESIGN AND USE
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE.
5 - 2 REFERENCED DOCUMENTS.
5 - 3 DEFINITIONS.
5 - 4 MATERIALS AND SURFACE FINISHES.
5 - 4.1 Materials.
7 - 4.2 Surface finishes.
8 - 4.3 Non-metallic surface finishes applied to the printed board.
11 - 5 CONNECTION TO THE CONDUCTIVE PATTERN.
13 - 6 DIMENSIONS.
13 - 6.1 Datum reference.
13 - 6.2 Outline dimensions of printed boards.
13 - 6.3 Board thickness.
14 - 6.4 Dimensions of holes.
15 - 6.5 Dimensions of slots and notches.
15 - 6.6 Dimensions of conductors.
17 - 6.7 Dimensional stability.
17 - 7 ELECTRICAL CHARACTERISTICS.
17 - 7.1 Resistance.
18 - 7.2 Current-carrying capacity.
22 - 7.3 Insulation resistance.
22 - 7.4 Voltage proof.
24 - 7.5 Other electrical characteristics.
24 - 8 MECHANICAL CHARACTERISTICS.
24 - 8.1 Adhesion of the conductive pattern.
25 - 8.2 Flatness.
25 - 9 MISCELLANEOUS.
25 - 9.1 Soldering.
26 - 9.2 Delamination.
27 - 9.3 Flammability.
28 - 10 PACKAGING OF PRINTED BOARDS.
28 - 10.1 General.
29 - 10.2 Packaging materials.
29 - 10.3 Procedures.
30 - APPENDIX A - DETERMINATION OF SIZE OF ACCESS HOLES IN PERMANENT PROTECTIVE COATING
30 - A1 GENERAL APPROACH.
31 - A2 CONSIDERATIONS FOR DETERMINING THE DIAMETER OF THE SMALLEST ACCESS HOLE (SAH).
31 - A3 CONSIDERATIONS FOR DETERMINING THE DIAMETER OF THE LARGEST ACCESS HOLE (LAH).
31 - A4 CONSIDERATIONS FOR DETERMINING THE DIAMETER OF THE NOMINAL ACCESS HOLE (NAH).

Describes fundamental information on the design and application of printed boards for electronic and electrical use, their technical limitations, and the features which can be expected. It is intended to provide guidance to both the designer and the user of printed boards and printed board assemblies. It is technically similar to IEC 326-3.

This Standard relates to all types of printed boards irrespective of the method of manufacture, to provide guidance to both the designer and the user of printed boards on matters relating to specification, design and application.