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GB/T 4725-2022: Epoxide woven glass fabric copper-clad laminated sheets for printed circuits
Status: Valid GB/T 4725: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4725-2022 | English | 199 |
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Epoxide woven glass fabric copper-clad laminated sheets for printed circuits
| Valid |
GB/T 4725-2022
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| GB/T 4725-1992 | English | 239 |
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Epoxide woven glass fabric copper-clad laminated sheets for printed circuits
| Obsolete |
GB/T 4725-1992
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PDF similar to GB/T 4725-2022
Standard similar to GB/T 4725-2022 GB/T 12631 GB/T 4721 GB/T 4722 Basic data | Standard ID | GB/T 4725-2022 (GB/T4725-2022) | | Description (Translated English) | Epoxide woven glass fabric copper-clad laminated sheets for printed circuits | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L30 | | Word Count Estimation | 10,178 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 4725-2022: Epoxide woven glass fabric copper-clad laminated sheets for printed circuits---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Epoxide woven glass fabric copper-clad laminated sheets for printed circuits
ICS 31.180
CCSL30
National Standards of People's Republic of China
Replacing GB/T 4725-1992, GB/T 12629-1990
Copper clad epoxy fiberglass cloth laminate for printed circuit
Published on 2022-03-09
2022-10-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface I
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Abbreviations 1
5 Product Category 1
6 Material 2
6.1 Copper foil 2
6.2 E glass fiber cloth 2
6.3 Resin system 2
7 Technical requirements 2
7.1 Appearance 2
7.2 Size 2
7.3 Performance requirements 2
8 Test method 7
9 Quality Assurance7
10 Packaging, marking, transport and storage7
11 Ordering documents 7
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document replaces GB/T 4725-1992 "Copper Clad Epoxy Glass Cloth Laminates for Printed Circuits" and GB/T 12629-1990 "Limited
Thin copper-clad epoxy glass cloth laminate with constant flammability (for the manufacture of multi-layer printed boards)". This document is mainly based on GB/T 4725-1992.
Combined with the content of GB/T 12629-1990.Compared with GB/T 4725-1992, except for structural adjustment and editorial changes, the main technical
The changes are as follows.
a) Changed product classification (see Chapter 5, 3.1 of GB/T 4725-1992);
b) The description of the structure is deleted (see 3.2 of GB/T 4725-1992);
c) Deleted the description of insulating base material (see 3.2.1 of GB/T 4725-1992);
d) Changed the requirements for copper foil (see 6.1, 3.2.2 of GB/T 4725-1992);
e) Added the requirements for E glass fiber cloth and resin system (see 6.2 and 6.3);
f) Changed the requirements for appearance and size (see 7.1, 7.2, 4.2.1~4.2.4 of GB/T 4725-1992);
g) Changed the performance requirements (see 7.3, 4.1, 4.2.5 of GB/T 4725-1992);
h) Appearance and dimension test methods are added (see Chapter 8);
i) Changed the performance test method (see 7.3, Chapter 8, 4.1, 4.2.5 of GB/T 4725-1992);
j) Change the quality assurance (see Chapter 9, Chapter 5 of GB/T 4725-1992);
k) Changed the technical requirements for packaging, marking, transportation and storage (see Chapter 10, Chapter 3.3 and Chapter 6 of GB/T 4725-1992);
l) Added the provisions for ordering documents (see Chapter 11).
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This document is under the jurisdiction of the National Printed Circuit Standardization Technical Committee (SAC/TC47).
This document is drafted by. Guangdong Shengyi Technology Co., Ltd., National Electronic Circuit Substrate Engineering Technology Research Center, Suzhou Shengyi Science and Technology Co., Ltd.
Technology Co., Ltd., Shaanxi Shengyi Technology Co., Ltd.
The main drafters of this document. Su Xiaosheng, Yang Zhongqiang, Cai Qiaoer, Yang Yan, Liu Shenxing, Wang Jinrui, Luo Penghui, Wang Airong.
The previous versions of this document and its superseded documents are as follows.
--- First published in 1984 as GB/T 4725-1984, first revised in.1992;
---First published in.1990 as GB/T 12629-1990;
--- This is the second revision, incorporating the content of GB/T 12629.
Copper clad epoxy fiberglass cloth laminate for printed circuit
1 Scope
This document specifies the product classification, materials and technical requirements of copper clad epoxy fiberglass cloth laminates for printed circuits (hereinafter referred to as "copper clad laminates").
Requirements, test methods, quality assurance, packaging, marking, transportation, storage and ordering documents.
This document is applicable to the design, manufacture, shipment monitoring and downstream use of single-sided or double-sided copper clad laminates with a thickness of 0.05mm~6.4mm.
Purchase inspection of households, etc.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 4721-2021 General Rules for Rigid Copper Clad Laminates for Printed Circuits
GB/T 4722-2017 Test method for rigid copper-clad laminates for printed circuits
GB/T 5230 Electrolytic copper foil for printed boards
GB/T 18373 E glass fiber cloth for printed boards
3 Terms and Definitions
There are no terms and definitions that need to be defined in this document.
4 Abbreviations
The following abbreviations apply to this document.
5 Product Category
The classification of copper clad laminates shall comply with the provisions of Table 1.
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