Nzira nhanhatu dzekuongorora dzePCB circuit board dunhu pfupi

1. Vhura iyo PCB dhizaini yekudhirowa pakombuta, vhenekera iyo pfupi-circuited network, uye ona pari padhuze, iri nyore kubatana kwairi. Teerera zvakanyanya kupfupi wedunhu mukati meIC.

2. Kana iri welding yemaoko, ita tsika yakanaka:

1) Usati watengesa, tarisa bhodhi rePCB nemaziso, uye shandisa multimeter kuti uone kana masekete makuru (kunyanya magetsi uye pasi) ipfupi-inotenderera;

2) Nguva imwe neimwe chip inotengeswa, shandisa multimeter kutarisa kana magetsi uye pasi zvakapfupika-kutenderera;

3) Usakanda simbi yekunyungudutsa zvisina tsarukano paunenge uchitengesa. Kana iwe ukakanda iyo solder pamakumbo echiputi (kunyanya pamusoro pezvikamu zvegomo), hazvizove nyore kuwana.

3. Dunhu pfupi rinowanikwa. Tora bhodhi kuti ucheke mutsara (kunyanya wakakodzera kune imwechete / kaviri-layer mabhodhi), uye wozopa simba chikamu chimwe nechimwe cheiyo inoshanda block zvakasiyana uye kuibvisa nhanho nhanho.

4. Shandisa short-circuit nzvimbo yekuongorora chiridzwa

5. Kana pane BGA chip, sezvo majoini ose e solder akafukidzwa ne chip uye haagoni kuonekwa, uye i-multi-layer board (pamusoro pe 4 layers), zvakanakisisa kuparadzanisa magetsi echiputi chimwe nechimwe panguva. dhizaini, uchishandisa magineti mabedhi kana 0 ohms Resistor kubatana, saka kana paine dunhu pfupi pakati pesimba rekupa nepasi, iyo magineti bead yekuona inobviswa, uye zviri nyore kutsvaga imwe chip. Nemhaka yokuti kuputika kweBGA kwakaoma zvikuru, kana kusina kukonzerwa nemuchina, kusava nehanya kuduku kuchaita pfupi-dunhu remagetsi riri pedyo uye pasi mabhora maviri ekutengesa.

6. Chenjerera paunenge uchitengesa madiki-saizi yepamusoro-gomo capacitors, kunyanya magetsi emagetsi mafirita capacitors (103 kana 104), izvo zvinogona kukonzera nyore kupfupika kwepakati pakati pemagetsi uye pasi. Ehe, dzimwe nguva nerombo rakashata, iyo capacitor pachayo ipfupi-inotenderera, saka nzira yakanaka ndeyekuyedza capacitor isati yave welding.