semi合集-English.pdf - 第6136页

SEMI G28-0997 © SE MI 1986, 1997 8 Figure 8 S.O. Leadfra me NOTICE: T hese stan dards do not purport to address s afety issues, if any , a ssociated with their use. It is the responsibility of the user o f th e se standa…

SEMI G28-0997 © SEMI 1986, 19977

Figure 6

Stamped Leadframe Terminology

Figure 7

S.O. Leadframe Standard

SEMI G28-0997 © SEMI 1986, 1997 8

Figure 8

S.O. Leadframe

NOTICE: These standards do not purport to address safety issues, if any, associated with their use. It is the

responsibility of the user of these standards to establish appropriate safety and health practices and determine the

applicability of regulatory limitations prior to use. SEMI makes no warranties or representations as to the suitability

of the standards set forth herein for any particular application. The determination of the suitability of the standard is

solely the responsibility of the user. Users are cautioned to refer to manufacturer’s instructions, product labels,

product data sheets, and other relevant literature respecting any materials mentioned herein. These standards are

subject to change without notice.

The user’s attention is called to the possibility that compliance with this standard may require use of copyrighted

material or of an invention covered by patent rights. By publication of this standard, SEMI takes no position

respecting the validity of any patent rights or copyrights asserted in connection with any item mentioned in this

standard. Users of this standard are expressly advised that determination of any such patent rights or copyrights, and

the risk of infringement of such rights, are entirely their own responsibility.

International), 3081 Zanker Road, San Jose, CA 95134. Reproduction o

the contents in whole or in part is forbidden without express written

consent of SEMI.

SEMI G29-1296

TEST METHOD FOR TRACE CONTAMINANTS IN MOLDING

COMPOUNDS

This document was editorially modified in September 2002. Changes were made to Section 5.4 to correct a

typographical error.

1 Purpose

1.1 This specification defines the test method for

determination of extractable trace contaminants in

molding compound.

2 Scope

2.1 This test method is suitable for all molding

compound materials and may be used by supplier and

customers to determine the trace contaminants in

molding compound.

2.2 This standard does not purport to address safety

issues, if any, associated with its use. It is the

responsibility of the users of this standard to establish

appropriate safety health practices and determine the

applicability or regulatory limitations prior to use.

3 Referenced Documents

3.1 ASTM Documents

ASTM D 1193 — Specification for Reagent Water

ASTM D 4327 — Anions in Water by Ion

Chromatography

4 Method Summary

4.1 Plastic molding compound material is molded,

ground to a defined mesh size, and placed into a sealed

extraction vessel with de-ionized water. Extraction is

carried out at 120 ± 2° C for 48 hours. The extract is

analyzed for both anionic and cationic impurities.

5 Sample Preparation

5.1 Samples of molding compound materials may be

obtained from either standard molding operations, or

prepared in the laboratory.

5.1.1 Samples from molding operations may include

mold runners post-cured according to manufacturer’s

recommendations.

5.1.2 To secure a sample in the laboratory, spread a

thin layer of uncured compound in a dedicated clean

1 American Society for Testing and Materials, 100 Barr Harbor

Drive, West Conshohocken, Pennsylvania 19428-2959, USA.

Telephone: 610.832.9585, Fax: 610.832.9555 Website:

www.astm.org

teflon-coated container. Cure and post-cure the

compound material according to manufacturer’s

recommendations.

5.2 Crush the cured material using a suitable grinding

apparatus, such as Spex mixer-mill No. 8000, or

equivalent.

NOTE 1: The grinder used must not generate excess localized

heat, or else sample decomposition and erroneous results may

be generated.

NOTE 2: Addition of liquid nitrogen is a suitable method for

eliminating undesirable thermal decomposition during

grinding.

5.3 Remove the ground compound and sieve it. Collect

for analysis the portion which passes through a 40 mesh

size, but is retained on a 100 mesh size screen. This

particle size is best suited for adequate extraction of

impurities.

5.4 Weigh 10 ± 0.1 grams of the powdered material

and place in an extraction vessel. Parr bombs with

teflon liners are suitable extraction vessels. Add 100 ml

de-ionized water. Prepare blank extraction vessel by

processing it in the same manner as your sample.

Weigh the sealed bombs and record their weights. Place

the sealed bottles on their sides in an oven at 120 ± 2° C

for forty-eight (48) hours.

NOTE 3: Certain compounds may require addition of reagent

grade methanol 10% (V:V) to enhance wetting.

5.5 At the completion of forty-eight (48) hours of

extraction, allow the bombs to cool to room

temperature and reweigh. If the weight loss exceeds 0.5

grams the sample should not be used for analysis.

Portion of this extract may be used to generate pH and

conductivity data. Anion analysis may be performed

using ion chromatography or specific ion electrodes.

Cation analysis may be conducted using atomic

absorption, plasma spectrometry, or ion

chromatography.

NOTE 4: It is important to avoid contamination with

particulate matter in the extract used for the analysis by AA,

ICAP, or IC. This procedure addresses determination of

extractive species only.