GB/T 5489-2018Printed circuit board draw (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 5489-1985 "Printed board drawing", compared with GB/T 5489-1985, the main technical changes are as follows.

--- Clearly the scope is only suitable for hand-drawing printed board drawings and printed board assembly assembly drawings, automatic CAD design can refer to this Standard (see Chapter 1);

--- Added terms and definitions (see Chapter 3);

--- Increased the requirements for graphics drawing, such as the figure number, graphics layer and origin requirements (see 4.2);

--- Increased the color drawing method and diagram outside the two-line outline of the conductive pattern; increase the conductive pattern drawing to indicate the wire width, the most Dimensional data requirements for small pitch, lands, ring width, margins, etc.; increase the need to consider large area conductive when drawing conductive patterns Area, balanced wire, isolation area, and spacer disk size; added the contents of the inner isolation area and isolation disk for drawing multilayer printed boards (see 4.2.4);

--- Added solder mask patterns such as resist pads, apertures and pad shapes (see 4.2.5);

--- Increased hole pattern, deleted the contents of holes and hole resistance (see 4.2.6);

--- Added structural element graphics (see 4.2.7);

--- Change the original standard marker symbol and marker symbol map to character graphics (see 4.2.8, 2.5 of the 1985 edition);

--- Added printed board graphics, including single-panel, double-panel, multi-layer board, imposition map, and surface mount component diagrams on printed boards (see 4.2.9);

--- Added printed board assembly graphics, including printed board assembly drawings, component and structural drawing, conductive patterns and cross-overs, etc. (see 4.2.10).

1 Scope

This standard specifies the drawing of printed board drawings and assembly drawings of printed board assemblies (hereinafter referred to as printed board assembly drawings).

This standard is applicable to the orthographic and symbolic drawings of printed board drawings and printed board assembly drawings marked by the dimension line method and the grid method. Drawing.

When using the automatic CAD to draw the printed board diagram, you can refer to it.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 1360 printed circuit grid system

GB/T 2036 printed circuit terminology

GB/T 4458.4 mechanical drawing size note

GB/T 4728 (all parts) Graphical symbols for electrical diagrams

3 Terms and definitions

The following terms and definitions as defined in GB/T 2036 apply to this document.

4 Requirements