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ASTM F 419 : 1994

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Test Method for Determining Carrier Density in Silicon Epitaxial Layers by Capacitance-Voltage Measurements on Fabricated Junction or Schottky Diodes (Withdrawn 2001)

Available format(s)

Hardcopy , PDF

Withdrawn date

31-12-2001

Language(s)

English

Published date

01-01-1994

€74.48
Excluding VAT

CONTAINED IN VOL. 10.05, 2001 Measures net carrier density in silicon epitaxial layers. Precision depends upon carrier density inhomogeneities parallel and perpendicular to junction and upon carrier density level.

Committee
F 01
DocumentType
Test Method
Pages
11
PublisherName
American Society for Testing and Materials
Status
Withdrawn

1.1 This test method covers the measurement of carrier density in silicon epitaxial layers. The precision that can be expected depends upon the carrier-density inhomogeneities parallel and perpendicular to the junction and upon the carrier-density level.

1.2 The measurement requires the formation of Schottky or p-n junction diodes on or in the epitaxial layer. In this sense the method is destructive (see, however, 5.2).

1.3 Both n- and -type epitaxial layers can be evaluated, on substrates of the same or opposite types, if the layer thickness is greater than twice the zero-bias depletion width plus, for diffused diodes only, the junction depth (1). This test method is also applicable to bulk material.

1.4 This test method covers the carrier density range from about 4 X 10 13 to about 8 X 10 16 carriers/cm (resistivity range from about 0.1 to about 100 [omega][dot]cm in -type wafers and from about 0.24 to about 330 [omega][dot]cm in -type wafers).

1.5 This test method includes procedures for checking both capacitance- and voltage-measuring equipment.

1.6 This test method provides two means of calculating the carrier density from capacitance-voltage data: an incremental method (12.3.1) and a curve-fitting method (12.3.2).

Note 1-An alternative method for determining carrier density in epitaxial layers is given in Test Method F1392. This and a related method, DIN 50439, use a mercury-probe Schottky barrier contact rather than a fabricated p-n junction or Schottky diode. Therefore, measurements by Test Method F1392 and DIN 50439 may not be entirely comparable to those made by this test method. DIN 50439 is also applicable to gallium arsenide as well as to silicon.

1.7 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 11.8 and 11.14.

ASTM F 978 : 2002 Standard Test Method for Characterizing Semiconductor Deep Levels by Transient Capacitance Techniques (Withdrawn 2003)
ASTM F 525 : 2000 : REV A Standard Test Method for Measuring Resistivity of Silicon Wafers Using a Spreading Resistance Probe (Withdrawn 2003)

ASTM F 95 : 1989 : R2000 Standard Test Method for Thickness of Lightly Doped Silicon Epitaxial Layers on Heavily Doped Silicon Substrates Using an Infrared Dispersive Spectrophotometer (Withdrawn 2003)
DIN 50439:1982-10 TESTING OF MATERIALS FOR SEMICONDUCTOR TECHNOLOGY; DETERMINATION OF DOPANT CONCENTRATION PROFILE OF SINGLE CRYSTALLINE SEMICONDUCTOR MATERIAL BY MEANS OF THE CAPACITANCE VOLTAGE METHOD AND MERCURY CONTACT
ASTM F 723 : 1999 Standard Practice for Conversion Between Resistivity and Dopant Density for Boron-Doped, Phosphorus-Doped, and Arsenic-Doped Silicon (Withdrawn 2003)

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