Khanyetso ea ho sala morao ea laminate ea koporo hangata e hlahisoa ke index ea ho bapisa ho latela (CTI).Har'a matlotlo a mangata a li-laminates tsa koporo (copper clad laminates bakeng sa nako e khutšoanyane), ho hanyetsa ho latela, e le index ea bohlokoa ea tšireletso le ho tšepahala, e 'nile ea nkoa e le ea bohlokoa ka ho fetisisa Boto ea potoloho ea PCB baqapi le baetsi ba boto ea potoloho.

Boleng ba CTI bo lekoa ho latela mokhoa o tloaelehileng oa IEC-112 "Test Method for Comparative Tracking Index of Substrates, Printed Boards and Printed Board Assemblies", ho bolelang hore bokaholimo ba substrate bo ka mamella marotholi a 50 a 0.1% ammonium chloride boleng bo phahameng ka ho fetisisa ba motlakase (V) moo tharollo ea metsi e sa hlahiseng mohlala oa ho lutla ha motlakase.Ho ea ka boemo ba CTI ba lisebelisoa tse sireletsang mocheso, UL le IEC li li arola ka lihlopha tse 6 le lihlopha tse 4 ka ho latellana.

Sheba Lethathamo la 1. CTI≥600 ke sehlopha se phahameng ka ho fetisisa.Li-laminate tsa koporo tse nang le litekanyetso tse tlase tsa CTI li na le tšekamelo ea ho latela ho lutla ha li sebelisoa nako e telele libakeng tse thata tse kang khatello e phahameng, mocheso o phahameng, mongobo le tšilafalo.

Ka kakaretso, CTI ea li-laminates tse tloaelehileng tsa koporo tse entsoeng ka pampiri (XPC, FR-1, joalo-joalo) ke ≤150, le CTI ea li-laminates tse tloaelehileng tse entsoeng ka koporo (CEM-1, CEM-3) le fiber e tloaelehileng ea khalase. lesela-based copper clad laminates (FR-4) E tloha ho 175 ho ea ho 225, e ke keng ea finyella litlhoko tse phahameng tsa polokeho ea lihlahisoa tsa elektronike le tsa motlakase.

Boemong ba IEC-950, kamano pakeng tsa CTI ea laminate ea koporo le matla a sebetsang a boto ea potoloho e hatisitsoeng mme sebaka se tlase sa terata (Minimum Creepage Distance) le sona se boletsoe.CTI e phahameng ea koporo e apereng laminate ha e tšoanelehe feela bakeng sa tšilafalo e phahameng, E boetse e loketse haholo bakeng sa tlhahiso ea liboto tsa potoloho tse hatisitsoeng ka bongata bakeng sa lisebelisoa tse phahameng tsa motlakase.Ha ho bapisoa le li-laminates tse tloaelehileng tsa koporo tse nang le khanyetso e phahameng ea ho latela ho lutla, sebaka sa mela ea liboto tsa potoloho tse hatisitsoeng tse entsoeng le tsa pele li ka lumelloa ho ba tse nyane.

Tracking: Mokhoa oa ho etsa butle-butle tsela ea conductive holim'a thepa e tiileng e sireletsang tlas'a ketso e kopantsoeng ea tšimo ea motlakase le electrolyte.

Comparative Tracking Index (CTI): Theko e phahameng ka ho fetisisa ea voltage eo bokaholimo ba thepa bo ka mamellang marotholi a 50 a electrolyte (0.1% ammonium chloride aqueous solution) ntle le ho etsa mohlala oa ho lutla, ho V.

Proof Tracking Index (PTI): The standstand voltage value moo bokaholimo ba thepa bo ka mamellang marotholi a 50 a electrolyte ntle le ho etsa mohlala oa ho lutla, o hlahisoang ka V.

CTI papiso ea teko ea koporo clad laminate

Ho eketsa CTI ea thepa ea lakane haholo-holo ho qala ka resin, 'me ho fokotsa liphatsa tsa lefutso tseo ho leng bonolo ho li etsa carbonize le tse bonolo ho senyeha ka mocheso mohahong oa limolek'hule tsa resin.