1、Designation:F 677 04An American National StandardStandard Test Method forFluid and Grease Resistance of Thermoset EncapsulatingCompounds Used in Electronic and MicroelectronicApplications1This standard is issued under the fixed designation F 677;the number immediately following the designation indic
2、ates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method determines the resistance of enc
3、apsu-lating compounds to fluids or greases by measuring changes inweight(Note 1)and volume under defined conditions of timeand temperature.NOTE1To provide consistency with the usage in other ASTM testmethods concerned with determining the properties of plastic materials,the terms“weight”and“weigh”ar
4、e used in this test method although theunits of measurement are those of mass.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determin
5、e the applica-bility of regulatory limitations prior to use.See 9.1.1.3 The values stated in SI units are standard.The values inparentheses are for information only.NOTE2There is no similar or equivalent IEC standard.2.Referenced Documents2.1 ASTM Standards:2D 1193 Specification for Reagent WaterD 1
6、711 Terminology Relating to Electrical InsulationD 5423 Specification for Forced-Convection LaboratoryOvens for Evaluation of Electrical InsulationD 6054 Practice for Conditioning Electrical Insulating Ma-terials for Testing3.Terminology3.1 Definitions:3.1.1 For the definitions of terms used in this
7、 standard,referto Terminology D 1711.4.Summary of Test Method4.1 Specimens of encapsulating compound are immersed influids or greases for specified conditions of temperature andtime.The weight and volume of each specimen is measuredbefore and after immersion and percent change is reported.4.2 The fl
8、uids and greases to be used as test media(8.3)arenot specified by the test method and shall be agreed to by theparties to the test.5.Significance and Use5.1 Fluids and greases in contact with encapsulating com-pounds may adversely modify the encapsulant properties withresulting damage or loss of pro
9、tection to components inelectronic applications.5.2 This test method provides a means for measuring theeffect of fluids and greases on various encapsulants.5.3 This test method is intended for use in research andevaluation.6.Interferences6.1 Test results obtained with molded or cast specimens offill
10、ed encapsulating compounds will differ from those obtainedwith cut or machined specimens(because of exposed fillers inthe latter).6.2 Lack of complete contact between the test medium andthe surfaces of the specimen may seriously affect the results ofthe test.6.3 Some encapsulants may be affected by
11、the reagentsspecified for use in removing the test media from the speci-mens.Alternative reagents may be required,as agreed upon bythe parties to the test.7.Apparatus7.1 Analytical Balance,capable of determining weight tothe nearest 0.001 g.7.2 Oven,forced-convection type meeting the requirementsof
12、Specification D 5423,Type I.1This test method is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.01 on Electrical Insulating Varnishes,Powders,and Encapsu-lating Compounds.Current edition approved March
13、 1,2004.Published March 2004.Originallyapproved in 1980.Discontinued 1991 and reinstated as F 677 95.Last previousedition approved in 1999 as F 677 95(1999).2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMSt
14、andards volume information,refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.7.3 Glass Dishes,of sufficient diameter for specimens to beexposed horizontally,and of sufficient h
15、eight for specimens tobe completely covered by the test medium.Aloose-fitting glasscover shall be provided for each dish(see 13.3).8.Reagents and Materials8.1 Use the following materials:8.1.1 Acetone.8.1.2 Distilled WaterType III Reagent Water as defined inSpecification D 1193.8.1.3 Isopropyl Alcoh
16、ol.8.2 Filter Paper,medium retention and medium filteringspeed,free of lint or foreign material.8.3 Test Mediaagreed-upon fluids or greases.9.Safety Precautions9.1 Some encapsulating compounds are known to containtoxic components,and special precautions are required inhandling.Follow manufacturers precautionary instructionsand sound laboratory safety practices.10.Sampling10.1 Because of the diverse nature of the encapsulatingcompounds,and the various forms and packages of resin,hardeners,catalys
