PCB (Printed Circuit Board) imagwira ntchito yofunika kwambiri m'moyo wamasiku ano.Ndiwo maziko ndi msewu waukulu wa zida zamagetsi.Pachifukwa ichi, khalidwe la PCB ndilofunika kwambiri.
Kuti muwone mtundu wa PCB, mayeso angapo odalirika ayenera kuchitidwa.Ndime zotsatirazi ndi mawu oyamba a mayeso.
1. Kuyesa kuipitsidwa kwa Ionic
Cholinga: Kuwona kuchuluka kwa ma ion pamwamba pa bolodi la dera kuti muwone ngati ukhondo wa bolodi wadera uli woyenera.
Njira: Gwiritsani ntchito 75% propanol kuyeretsa pamwamba.Ions akhoza kupasuka mu propanol, kusintha madutsidwe ake.Kusintha kwa conductivity kumalembedwa kuti mudziwe ndende ya ion.
Muyezo: zochepa kuposa kapena zofanana ndi 6.45ug.NaCl/sq.in
2. Chemical resistance test of solder mask
Cholinga: Kuwona kukana kwa mankhwala kwa solder mask
Njira: Onjezani qs (quantum kukhutitsidwa) dichloromethane dropwise pachitsanzo pamwamba.
Patapita kanthawi, pukutani dichloromethane ndi thonje loyera.
Yang'anani kuti muwone ngati thonje ladetsedwa komanso ngati chigoba cha solder chasungunuka.
Standard: Palibe utoto kapena kusungunuka.
3. Mayeso olimba a solder mask
Cholinga: Onani kuuma kwa chigoba cha solder
Njira: Ikani bolodi pamalo athyathyathya.
Gwiritsani ntchito cholembera choyesera kuti mukanda kuuma kosiyanasiyana pa bwato mpaka palibe zokala.
Lembani kuuma kotsikitsitsa kwa pensulo.
Muyezo: Kulimba kocheperako kuyenera kukhala kopitilira 6H.
4. Kuvula mphamvu kuyesa
Cholinga: Kuwona mphamvu yomwe imatha kuvula mawaya amkuwa pa board board
Zida: Peel Strength Tester
Njira: Mangani waya wamkuwa osachepera 10mm kuchokera mbali imodzi ya gawo lapansi.
Ikani mbale yachitsanzo pa tester.
Gwiritsani ntchito mphamvu yoyima kuti muvule waya wamkuwa wotsalawo.
Lembani mphamvu.
Standard: Mphamvu iyenera kupitirira 1.1N / mm.
5. Solderability mayeso
Cholinga: Kuyang'ana kusungunuka kwa mapepala ndi mabowo pa bolodi.
Zida: Soldering makina, uvuni ndi timer.
Njira: Kuphika bolodi mu uvuni pa 105 ° C kwa ola limodzi.
Dip flux.Ikani bolodi mwamphamvu m'makina a solder pa 235 ° C, ndipo mutulutse pambuyo pa masekondi atatu, kuyang'ana dera la pedi lomwe linaviikidwa mu malata.Ikani bolodi molunjika mu makina otenthetsera pa 235 ° C, itulutseni pakatha masekondi atatu, ndipo muwone ngati bowo laviikidwa mu malata.
Muyezo: Gawo la gawo liyenera kukhala lalikulu kuposa 95. Kupyolera mu mabowo ayenera kumizidwa mu malata.
6. Mayeso a Hipot
Cholinga: Kuyesa kupirira mphamvu yamagetsi ya board board.
Zida: Hipot tester
Njira: Zitsanzo zoyeretsa ndi zouma.
Lumikizani bolodi ku tester.
Wonjezerani voteji kufika 500V DC (mwachindunji panopa) pa mlingo wosaposa 100V/s.
Gwirani pa 500V DC kwa masekondi 30.
Standard: Pasakhale zolakwika pa dera.
7. Mayeso a kutentha kwa kusintha kwa galasi
Cholinga: Kuwona kutentha kwa galasi la mbale.
Zida: DSC (Differential Scanning Calorimeter) tester, uvuni, chowumitsira, masikelo apakompyuta.
Njira: Konzani chitsanzo, kulemera kwake kuyenera kukhala 15-25mg.
Zitsanzozo zinaphikidwa mu ng'anjo pa 105 ° C kwa maola 2, ndiyeno zitakhazikika kutentha kwa chipinda mu desiccator.
Ikani zitsanzo pagawo lachitsanzo la choyesa cha DSC, ndikuyika kutentha kwa 20 °C / min.
Jambulani kawiri ndikulemba Tg.
Muyezo: Tg iyenera kupitirira 150 ° C.
8. CTE (coefficient of thermal expansion) kuyesa
Cholinga: CTE ya board of evaluation.
Zida: TMA (thermomechanical analysis) tester, uvuni, dryer.
Njira: Konzani chitsanzo ndi kukula kwa 6.35 * 6.35mm.
Zitsanzozo zinaphikidwa mu ng'anjo pa 105 ° C kwa maola 2, ndiyeno zitakhazikika kutentha kwa chipinda mu desiccator.
Ikani zitsanzo pagawo lachitsanzo la choyesera cha TMA, ikani kutentha kwa 10°C/mphindi, ndipo ikani kutentha komaliza kufika 250°C.
Lembani CTEs.
9. Kuyesa kukana kutentha
Cholinga: Kuwunika kutentha kwa bolodi.
Zida: TMA (thermomechanical analysis) tester, uvuni, dryer.
Njira: Konzani chitsanzo ndi kukula kwa 6.35 * 6.35mm.
Zitsanzozo zinaphikidwa mu ng'anjo pa 105 ° C kwa maola 2, ndiyeno zitakhazikika kutentha kwa chipinda mu desiccator.
Ikani zitsanzo pagawo lachitsanzo la choyesera cha TMA, ndikuyika kutentha kwa 10 °C / min.
Kutentha kwachitsanzo kunakwezedwa ku 260 ° C.
Chengyuan Industry Professional Coating Machine Manufacturer
Nthawi yotumiza: Mar-27-2023