Kev taug qab tsis kam ntawm tooj liab clad laminate feem ntau yog qhia los ntawm kev sib piv kev ntsuas ntsuas (CTI).Ntawm ntau yam khoom ntawm tooj liab clad laminates (tooj liab clad laminates luv luv), taug qab tsis kam, raws li qhov tseem ceeb ntawm kev nyab xeeb thiab kev ntseeg siab, tau nce nqi los ntawm PCB Circuit Board designers thiab circuit board manufacturers.

Tus nqi CTI raug kuaj raws li IEC-112 tus qauv qauv "Test Method for Comparative Tracking Index of Substrates, Printed Boards and Printed Board Assemblies", uas txhais tau hais tias qhov saum npoo ntawm substrate tuaj yeem tiv taus 50 tee ntawm 0.1% ammonium chloride. tus nqi siab tshaj qhov hluav taws xob (V) uas cov tshuaj aqueous tsis tsim cov kab hluav taws xob tawm.Raws li CTI qib ntawm cov ntaub ntawv insulating, UL thiab IEC muab faib ua 6 qib thiab 4 qib raws.

Saib Table 1. CTI≥600 yog qib siab tshaj.Copper clad laminates uas tsis tshua muaj CTI qhov tseem ceeb yog qhov ua rau cov dej ntws mus txog thaum siv lub sijhawm ntev hauv qhov chaw hnyav xws li kev kub siab, kub, av noo, thiab muaj kuab paug.

Feem ntau, CTI ntawm cov ntawv zoo tib yam tooj liab clad laminates (XPC, FR-1, thiab lwm yam) yog ≤150, thiab CTI ntawm cov khoom siv zoo tib yam-raws li tooj liab clad laminates (CEM-1, CEM-3) thiab cov iav fiber ntau. daim ntaub-raws li tooj liab clad laminates (FR-4) Nws nyob ntawm 175 mus rau 225, uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb dua ntawm cov khoom siv hluav taws xob thiab hluav taws xob.

Hauv IEC-950 tus qauv, kev sib raug zoo ntawm CTI ntawm tooj liab clad laminate thiab kev ua haujlwm voltage luam tawm Circuit Board thiab qhov tsawg kawg nkaus xaim sib nrug (Minimum Creepage Distance) kuj tau teev tseg.Lub siab CTI tooj liab clad laminate tsis yog tsuas yog haum rau cov pa phem, Nws kuj yog heev haum rau zus tau tej cov high-density printed circuit boards rau high-voltage daim ntaub ntawv.Piv nrog rau cov tooj liab clad laminates zoo tib yam nrog cov dej ntws mus txog qhov ua haujlwm siab, cov kab sib nrug ntawm cov ntawv luam tawm hauv Circuit Court boards ua nrog cov qub tuaj yeem tso cai me me.

Taug qab: Cov txheej txheem ntawm maj mam tsim ib txoj kev coj mus rau saum npoo ntawm cov khoom siv insulating nyob rau hauv kev sib xyaw ua ke ntawm cov hluav taws xob thiab cov electrolyte.

Comparative Tracking Index (CTI): Cov nqi hluav taws xob siab tshaj plaws ntawm qhov saum npoo ntawm cov khoom tuaj yeem tiv taus 50 tee ntawm electrolyte (0.1% ammonium chloride aqueous tov) yam tsis tau tsim ib txoj kab ntawm to, hauv V.

Pov Thawj Kev Ntsuas Ntsuas (PTI): Tus nqi hluav taws xob tiv thaiv qhov chaw ntawm cov khoom siv tuaj yeem tiv taus 50 tee ntawm electrolyte yam tsis tau tsim ib txoj kab ntawm to, qhia hauv V.

CTI kev sib piv ntawm tooj liab clad laminate

Kev nce CTI ntawm cov ntaub ntawv feem ntau pib nrog cov resin, thiab txo cov noob uas yooj yim rau carbonize thiab yooj yim rau thermally decomposed nyob rau hauv cov resin molecular qauv.