This standard was transferred to SEMI (www.semi.org) May 2003
1.1 This test method covers the measurement of the resistivity of silicon wafers with a in-line four-point probe. The resistivity of a silicon crystal is an important materials acceptance requirement. This test method describes a procedure that will enable interlaboratory comparisons of the room temperature resistivity of silicon wafers. The precision that can be expected depends on both the resistivity of the wafer and on the homogeneity of the wafer. Round-robin tests have been conducted to establish the expected precision for measurements on p-type wafers with room temperature (23°C) resistivity between 0.0008 and 2000 cm and on n-type wafers with room-temperature (23°C) resistivity between 0.0008 and 6000 cm.
1.2 This test method is intended for use on single crystals of silicon in the form of circular wafers with a diameter greater than 16 mm (0.625 in.) and a thickness less than 1.6 mm (0.0625 in.). Geometrical correction factors required for these measurements are available in tabulated form.
1.3 This test method is to be used as a referee method for determining the resistivity of single crystal silicon wafers in preference to Test Methods F43.
Note 1—The test method is also applicable to other semiconductor materials but neither the appropriate conditions of measurement nor the expected precision have been experimentally determined. Other geometrics for which correction factors are not available can also be measured by this test method but only comparative measurements using similar geometrical conditions should be made in such situations.
Note 2—DIN 50431 is a similar, but not equivalent, method for determining resistivity. It is equivalent to Test Methods F43.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 8.
| SDO | ASTM: ASTM International |
| Document Number | F84 |
| Publication Date | Dec. 10, 2002 |
| Language | en - English |
| Page Count | 14 |
| Revision Level | 02 |
| Supercedes | |
| Committee | F01.06 |
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