PCB (Printed Circuit Board) inoita basa rakakosha muhupenyu hwanhasi.Ndiyo nheyo uye nzira huru yezvigadzirwa zvemagetsi.Panyaya iyi, kunaka kwePCB kwakakosha.
Kuti utarise kunaka kwePCB, bvunzo dzinoverengeka dzekuvimbika dzinofanirwa kuitwa.Ndima dzinotevera isumo yebvunzo.
1. Ionic kusvibiswa bvunzo
Chinangwa: Kutarisa nhamba yeoni pamusoro pebhodhi redunhu kuti uone kana kuchena kwebhodhi redunhu kwakakodzera.
Nzira: Shandisa 75% propanol kuchenesa nzvimbo yemuenzaniso.Ions inogona kunyungudika kuva propanol, ichichinja conductivity yayo.Shanduko mune conductivity inonyorwa kuti ione ion concentration.
Chiyero: isingasviki kana kuenzana ne6.45ug.NaCl/sq.in
2. Chemical resistance test ye solder mask
Chinangwa: Kutarisa kupikisa kwemakemikari ye solder mask
Nzira: Wedzera qs (quantum kugutsikana) dichloromethane inodonha pane iyo sampuli yepamusoro.
Mushure mechinguva, pukuta dichloromethane nekotoni chena.
Tarisa kuti uone kana iyo donje yakasvibiswa uye kana iyo solder mask yakanyungudika.
Standard: Hapana dhayi kana kunyungudika.
3. Kuoma bvunzo ye solder mask
Chinangwa: Tarisa kuoma kweiyo solder mask
Method: Isa bhodhi panzvimbo yakati sandara.
Shandisa chinyoreso chekuyedza kukwenya huwandu hwekuoma kwechikepe kusvika pasisina zvikwambo.
Nyora pasi pasi kuoma kwepenzura.
Standard: Iko kuomarara kudiki kunofanirwa kunge kwakakwira kupfuura 6H.
4. Kubvisa bvunzo yesimba
Chinangwa: Kutarisa simba rinogona kubvisa waya dzemhangura pabhodhi redunhu
Zvishandiso: Peel Simba Tester
Nzira: Bvisa waya yemhangura inosvika 10mm kubva kune rumwe rutivi rwe substrate.
Isa ndiro yemuenzaniso pane tester.
Shandisa simba rakamira kuti ubvise waya yemhangura yasara.
Rekodha simba.
Chiyero: Simba rinofanira kudarika 1.1N/mm.
5. Solderability bvunzo
Chinangwa: Kutarisa kutengeswa kwemapadhi uye kuburikidza-maburi pabhodhi.
Zvishandiso: muchina wekutengesa, oveni uye timer.
Nzira: Bika bhodhi muchoto pa105 ° C kweawa imwe.
Dip flux.Isa bhodhi zvakasimba mumushini wekutengesa pa 235 ° C, uye ubudise kunze mushure memasekondi matatu, uchitarisa nzvimbo yepadhi yakanyikwa mutin.Isa bhodhi rakatwasuka mumuchina wekutengesa pa235 ° C, woiburitsa mushure memasekondi matatu, uye tarisa kana gomba rakanyikwa murata.
Chiyero: Chikamu chechikamu chinofanira kuva chikuru kudarika 95. Zvose kuburikidza nemakomba zvinofanira kunyudzwa mumarata.
6. Hipot test
Chinangwa: Kuedza kutsungirira voltage kugona kwebhodhi redunhu.
Zvishandiso: Hipot tester
Nzira: Yakachena uye yakaoma samples.
Batanidza bhodhi kune tester.
Wedzera magetsi kusvika ku500V DC (yakananga ikozvino) pamwero usingakwire kupfuura 100V/s.
Ibate pa500V DC kwemasekonzi makumi matatu.
Standard: Panofanira kunge pasina kukanganisa padunhu.
7. Girazi shanduko yekushisa bvunzo
Chinangwa: Kutarisa girazi shanduko yekushisa yeplate.
Zvishandiso: DSC (Differential Scanning Calorimeter) tester, oveni, dryer, zviyero zvemagetsi.
Nzira: Gadzirira muenzaniso, uremu hwayo hunofanira kuva 15-25mg.
Mienzaniso yakabikwa muchoto pa 105 ° C kwemaawa maviri, uye ndokuzonyoroveswa kusvika kukushisa kwekamuri mune desiccator.
Isa sampuli pane yemuenzaniso nhanho yeDSC tester, uye isa mwero wekudziya kusvika ku20 °C/min.
Skena kaviri uye rekodha Tg.
Standard: Tg inofanira kunge yakakwira kupfuura 150°C.
8. CTE (coefficient of thermal expansion) bvunzo
Chinangwa: CTE yedare rekuongorora.
Zvishandiso: TMA (thermomechanical analysis) tester, oveni, dryer.
Nzira: Gadzirira muenzaniso nehukuru hwe 6.35 * 6.35mm.
Mienzaniso yakabikwa muchoto pa 105 ° C kwemaawa maviri, uye ndokuzonyoroveswa kusvika kukushisa kwekamuri mune desiccator.
Isa sampu padanho remuenzaniso weTMA tester, isa mwero wekupisa kusvika 10°C/min, uye isa tembiricha yekupedzisira kusvika 250°C.
Rekodha CTEs.
9. Heat resistance test
Chinangwa: Kuongorora kupisa kupisa kwebhodhi.
Zvishandiso: TMA (thermomechanical analysis) tester, oveni, dryer.
Nzira: Gadzirira muenzaniso nehukuru hwe 6.35 * 6.35mm.
Mienzaniso yakabikwa muchoto pa 105 ° C kwemaawa maviri, uye ndokuzonyoroveswa kusvika kukushisa kwekamuri mune desiccator.
Isa sampuli pane yemuenzaniso nhanho yeTMA tester, uye isa mwero wekupisa pa10 °C/min.
Sample tembiricha yakasimudzwa kusvika 260°C.
Chengyuan Indasitiri Professional Coating Machine Manufacturer
Nguva yekutumira: Mar-27-2023