Kune akawanda mainjiniya emagetsi, pamwe, ivo vane hunyanzvi mukugadzira mabhodhi avo ePCB, uye ivo vanonyatsoziva kuti rudzii rwenzvimbo yekushanda PCB yavo ichashandiswa mairi, asi havana ruzivo rwekudzivirira mabhodhi avo edunhu uye zvikamu uye kuwedzera yavo. hupenyu hwebasa.Ndiyo conformal coating ye.
Chii chinonzi conformal coating?
Conformal coating ifirimu rakatetepa repolymeric rinoiswa kune rakadhindwa redunhu bhodhi (PCB) kuitira kuchengetedza bhodhi nezvikamu zvaro kubva kune zvakatipoteredza uye ngura.Iyi firimu rinowanzo shandiswa pa 25- 250µm uye 'inopindirana' kune chimiro chebhodhi nezvikamu zvaro, kuvhara nekudzivirira majoini ekutengesa, inotungamira yezvigadzirwa zvemagetsi, zviratidziro zvakafumurwa, uye dzimwe nzvimbo dzakagadzirwa nesimbi kubva mukuora, pakupedzisira kuwedzera hupenyu hwekushanda. zvePCB.
Sei uchida conformal coating?
Ichangobva kugadzirwa yakadhindwa redunhu bhodhi rinowanzoita zvakanaka, asi kuita kunogona kukurumidza kushata nekuda kwekunze kwezvinhu munzvimbo yayo yekushanda.Conformal coatings inogona kushandiswa munzvimbo dzakasiyana siyana kuchengetedza akadhindwa edunhu mabhodhi kubva kunyoro, munyu pfapfaidzo, makemikari uye tembiricha yakanyanyisa kuitira kudzivirira zvinhu zvakadai sekuora, mold kukura uye kutadza kwemagetsi.Dziviriro inopihwa neaya akajairwa anobvumira kukwirisa voltage gradients uye padyo netrack spacing, zvichizogonesa vagadziri kuti vasangane nezvinodiwa zveminiaturization uye kuvimbika.
1. Insulating zvivakwa zvinobvumira kudzikiswa kwePCB conductor spacing inopfuura 80%
2. Inogona kubatsira kubvisa kudiwa kwezvivharo zvakaoma, zvakaoma.
3. Kurema kwakareruka.
4. Chengetedza gungano zvachose pakurwisa kwekemikari uye kunoparadza.
5. Bvisa kukanganisa kwekuita kunogona kuitika nekuda kwengozi yezvakatipoteredza.
6. Kuderedza kushushikana kwezvakatipoteredza pamusangano wePCB.
Sezvineiwo, conformal coatings inofanira kuratidza zvinotevera maitiro:
1. Kushandisa nyore.
2. Kubvisa nyore, kugadzirisa uye kutsiva.
3. High flexibility.
4. Dziviriro kubva pakupisa uye mechanical shock.
5.Kudzivirirwa kune njodzi dzezvakatipoteredza dzinosanganisira: unyoro, makemikari uye zvimwe zvinopisa zvinhu.
Unoshandisa sei Conformal Coating?
Nzira ina huru dzekushandisa conformal coating:
1. Dipping - inogumira kune zvinhu zvisingarape nekukurumidza nehunyoro, oxidation kana chiedza.
2. Sarudzo yerobhoti yakagadzirwa -seAsymtek, PVA kana DIMA.Mhando dzese dzekuputira dzinogona kushandiswa kana musoro wakasarudzika wakasarudzwa.
3. Kupfapfaidza -pfapfaidza nemaoko uchishandisa dumba rekupfapfaidza kana gaba reaerosol.Zvose zvinoputika zvinogona kushandiswa nenzira iyi.
4. Kubhurasha-inoda vashandi vane hunyanzvi uye vane hunyanzvi kuitira kuti ive yakakodzera zvinangwa zvekugadzira.
Pakupedzisira iwe uchafanirwa kufunga nezve nzira yekurapa inotarwa neiyo yekupfeka yakasarudzwa, mhepo yakaoma, oveni yakaoma kana UV mwenje kurapa.Iyo yekuputira yemvura inofanirwa kunyorovesa zvese nzvimbo uye kurapa pasina kusiya hurema hwepamusoro.Epoxies inonyanya kunetseka kune kuremara kwepamusoro.Epoxies inogona zvakare kuderera paunenge uchiisa uye inogona kurasikirwa neadhesion semhedzisiro Mukuwedzera;kuderera zvakanyanya panguva yekurapa kunogona kuisa zvakanyanya kushushikana kwemechani pazvikamu zvedunhu.
Kana iwe uchida kudzidza zvakawanda nezve conformal coating, PHILIFAST inokupa gwara iwe nezvazvo.PHILIFAST teerera kune yega yega ruzivo kuti ikupe iwe PCB mabhodhi nehupenyu hwesevhisi yepamusoro nekuchengetedza chikamu chimwe nechimwe chakakosha chero zvikamu uye dunhu.
Nguva yekutumira: Jun-22-2021