化學(xué)英語(yǔ)證書考試(pec)化工機(jī)械術(shù)語(yǔ)

1、化學(xué)英語(yǔ)證書考試化學(xué)英語(yǔ)證書考試（PEC）化工機(jī)械術(shù)語(yǔ)化工機(jī)械術(shù)語(yǔ)AAlignment:Theproperrelativepositionaccuracyofagraphicimageonanemulsionphotoresistfilmmaskwithrespecttoanexistinggraphicimageonasubstrate.Alignmentmarks:Imagesivelyplacedwithinwithoutanar

2、rayfeithertestingaligningboth.Angstrom():Unitdefinitionusedtodefinelightwavelengthultravioletenergyxraysoneangstromisequivalentto10nanometers(1.01010meters).Artwk:Anaccuratelyscaledpatternwhichisusedwithproducingthetechn

3、icalengineeringdrawingartwkphotomasterphotomask(s)aproductconsistingofanimageonthestablebasesurface.Theproperdeiontodefineartwkmustincludetherequiredspecificationftoneientationthesespecificationsimpactsubsequentphotoproc

4、essingoperationsusability.Artwkmaster:Anaccurateonetoonepatternusuallyasingleimagewhichiswhatisusedinproducingthephotomask(s).Theproperdeiondefiningtheartwkmastermustincludetherequiredspecificationftonethesespecification

5、sarewhatimpactsubsequentphotoprocessingCADCAMoperations.BBackground:Thesurfaceareaagainstwhichthepatternisrelieved.Thesurfaceareaofthebackgroundisusuallymuchgreaterthanthearearelieved.Backlighting:Viewingphotographingano

6、bjectbyplacingitbetweenalightsourceontowhichastrippablephotosenseisappliedfusewithproducingphototools.BderArea:Regionareasoutsidethefunctionalpatternarea(s).BderData:Thedatapatternswhichappearwithinthebdersareasofphototo

7、olingthepatternsmayincludetoolingholebullseyesidentificationtestregistrationmarks.Bullseye:Stylizedcontrolpatternlocatedwithinthebdersareasofa(phototoolphotomaskphotoregisteredthentransferredtoathirdsubstrate.Thismaybeac

8、complishedinconjunctionwithcontactprintingcamerasoperations.Thecompositionusuallyinvolvesintermediatephototools.ContactPrinting:Aphotographicprocesswithimagesbeingtransferredfromonesurfacebylightexposuretothephotosensesi

9、deofasecond.Theprintedimageientationisdependentontherelativepositioningofthesurfacesthetoneisdependentonthephotosensitivechemicalmatterused.Codinatograph:Anxycodinatephotoplottingmachineconsistingofafixedrotatingtable&mo

10、vableheadonfixedwaysthatiscapableofpreciselylocatingapointonalinesurface.Acodinatographiscommonlyusedwithcutstripscribecoatmaterialstogenerateartwkpatterns.CopyCamera:Camerasadaptedfenlargingreducingcolseparating&photogr

11、aphicmaterialsscreening.Alsoreferredtoasaprocesscamera.CosineLaw:Anilluminationlawwhichindicatesthatthefluxradiatedreceivedinagivendirectionvarieswiththeprojectedareaofthereceiveremitterinaplaneperpendiculartothefluxdire

12、ction.Crease:Alinegrooveridgethatismadebyasifbyfoldingapliablesubstance.CutStrip:Amethodfproducingartwkbycuttingtheatternthenstrippingawaytheunwantedareasoftwolayersaterialtheengineeringterminology“cutstrip”&“CutPeel”are

13、synonymous.Thepreferabletermis“CutStrip.”DDatum:Apositionelementinrelationtowhichothersaredetermined.DatumLine:Alinefromwhichdistancesdimensionsarereckoned.DatumPlane:Aplanefromwhichdistancesdimensionsarereckoned.Datumpo

14、int:Apointusedasthebasisfreckoning.Defect:Anundesirableblemishwithinthefunctionalpatternbackgroundcommonlycalledflecksvoidspinholesspursnotchesetc.Definition:Thefidelityofreproductionwiththepatternedgerelativetotheiginal

15、engineeringmaster.Density(D):Thelog(1T)whereTistransparency.ThevaluefDdependsonthephotoemulsioncomponentthemagnitudepowernatureoftheexposurethedevprocessingconditionsthedensitometeropticalarrangement.DesignofExperiments: