Kuramba kwekutevera kwemhangura clad laminate kunowanzo kuratidzwa neiyo comparative tracking index (CTI).Pakati pezvinhu zvakawanda zvemhangura clad laminates (copper clad laminates kwenguva pfupi), kutevera kuramba, seyakakosha kuchengetedza uye kuvimbika index, yave ichiwedzera kukosheswa. PCB redunhu bhodhi vagadziri uye vagadziri vebhodhi redunhu.

Iko CTI kukosha kunoedzwa zvinoenderana neIEC-112 yakajairwa nzira "Test Method for Comparative Tracking Index ye Substrates, Printed Boards and Printed Board Assemblies", zvinoreva kuti pamusoro peiyo substrate inogona kumira makumi mashanu madonhwe e0.1% ammonium chloride The Ukoshi hwepamusoro-voltige (V) apo mhinduro ine aqueous haiumbe twumwero twekubuda kwemagetsi.Zvinoenderana neiyo CTI nhanho yezvinhu zvinodzivirira, UL neIEC zvinozvipatsanura kuita 6 mamakisi uye 4 mamakisi zvichiteerana.

Ona Tafura 1. CTI≥600 ndiyo giredhi repamusoro.Copper clad laminates ine yakaderera CTI tsika dzinowanzo kudonhedza kuronda kana ichishandiswa kwenguva yakareba munzvimbo dzakaoma senge kudzvanywa, tembiricha yepamusoro, humidity, uye kusvibiswa.

Kazhinji, iyo CTI yeakajairwa pepa-based copper clad laminates (XPC, FR-1, nezvimwewo) iri ≤150, uye iyo CTI yeakajairwa-based copper clad laminates (CEM-1, CEM-3) uye yakajairwa girazi fiber. jira-based copper clad laminates (FR-4) Inotangira kubva ku175 kusvika ku225, iyo isingakwanisi kusangana nepamusoro pekuchengetedza zvinodiwa zvemagetsi nemagetsi zvigadzirwa.

Mune iyo IEC-950 yakajairwa, hukama pakati peCTI yemhangura yakapfeka laminate uye kushanda kwemagetsi bhodhi redunhu rakadhindwa uye iyo yakaderera waya spacing (Minimum Creepage Distance) inotemerwa zvakare.Iyo yakakwira CTI copper clad laminate haina kungokodzera kusvibiswa kwepamusoro, Inokodzerawo kugadzirwa kwepamusoro-density akadhindwa edunhu mabhodhi e-high-voltage application.Kuenzaniswa neakajairwa mhangura akapfeka laminates ane yakakwira kuvuza yekutevera kuramba, mutsara wemutsara wemabhodhi edunhu akadhindwa akagadzirwa neakare anogona kubvumidzwa kuve madiki.

Kutevera: Maitiro ekugadzira zvishoma nezvishoma nzira inofambisa pamusoro peiyo yakasimba insulating zvinhu pasi pechiito chakabatanidzwa chemunda wemagetsi uye electrolyte.

Comparative Tracking Index (CTI): Iyo yakanyanya kukosha yevoltage uko pamusoro pechinhu chinogona kumira makumi mashanu madonhwe eelectrolyte (0.1% ammonium chloride aqueous solution) pasina kugadzira kudonha, muV.

Proof Tracking Index (PTI): Kumira kwevoltage ukoshi uko pamusoro pechinhu chinogona kumira makumi mashanu madonhwe e electrolyte pasina kuumba kudonha kwemvura, kunoratidzwa muV.

CTI bvunzo yekuenzanisa yemhangura clad laminate

Kuwedzera iyo CTI yepepa zvinhu zvinonyanya kutanga neresin, uye kuderedza majini ayo ari nyore kuita carbonize uye ari nyore kuve akaora nemafuta mu resin molecular chimiro.