GB/T 8756-2018Collection of metallographs on defects of germanium crystal (English PDF)

Foreword

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

This standard replaces GB/T 8756-1988 "Germanium crystal defect map". This standard is compared with GB/T 8756-1988, the main technical changes The following is as follows.

--- Deleted 34 original defect maps, respectively, Figure 1, Figure 2, Figure 3, Figure 4, Figure 6, Figure 8, Figure 9, Figure 15, Figure 16, Figure 20, 21, 23, 24, 28, 29, 30, 32, 33, 78, 87, 88, 90, 91, 95, Figure 96, Figure 102, Figure 106, Figure 113, Figure 114, Figure 115, Figure 116, Figure 124, Figure 125, Figure 132 (see the 1st edition of the 1988 edition) Chapters, Chapter 2, Chapter 3);

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

--- Added 44 maps, respectively, Figure 1, Figure 2, Figure 3, Figure 4, Figure 6, Figure 8, Figure 9, Figure 13, Figure 14, Figure 15, Figure 16, Figure 22, 23, 24, 29, 30, 31, 33, 34, 80, 89, 90, 92, 93, 96, 97, 98, 99, 105, 106, 116, 117, 118, 119, 120, 128, 129, and 130, Figure 131, Figure 132, Figure 133, Figure 135, Figure 141, Figure 142 (see Chapter 4);

--- Improve the characteristics and causes of various types of defects (see Chapter 4);

--- Added informative Appendix A "Crystal Defect Elimination Method", and gave a method for eliminating some crystal defects (see Appendix A);

--- Removed the "Appendix B Transmission Electron Microscopy (TEM) (Supplement)" in the original standard (see Appendix B of the 1988 edition).

1 Scope

This standard stipulates the defects caused by the preparation and processing of polycrystalline and germanium single crystals, and gives the characteristics and origin of various defects. Because of the elimination method.

This standard is applicable to defects in the production process of zone melting ingots, tantalum single crystals, tantalum abrasive sheets and tantalum polishing sheets.

2 Normative references

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

GB/T 14264 semiconductor material terminology

3 Terms and definitions

The following terms and definitions as defined in GB/T 14264 apply to this document.

4 Germanium crystal defects