PCB dhizaini inoda kutariswa kune akati wandei ekuchengetedza madaro, anosanganisira kutsvaga spacing, mavara spacing, uye pad spacing. Aya mafungidziro anogona kazhinji kuiswa mumhando mbiri: magetsi ekuchengetedza madaro uye asiri emagetsi ekuchengetedza madaro.
01 Electrical Safety Distances
Trace-to-Trace Spacing
Kune vagadziri vePCB vemazuva ese, nzvimbo shoma pakati pezvitsvagiso haifanire kunge iri shoma pane 0.075mm. Mutsara mudiki-diki (minimum trace spacing) zvinoreva kanhambwe kadiki pakati pezvikwambo kana pakati pechironda nepedhi. Kubva pakuona kwekugadzira, nzvimbo yakakura iri nani, ne 0.127mm kuva mwero wakafanana.
Pad Hole Diameter uye Pad Width
Kana iyo padhi inoshandisa mechanical kuchera, iyo shoma gomba dhayamita haifanire kunge isingasviki 0.2mm; yekuchera laser, iyo shoma gomba dhayamita ndeye 0.1mm. Iyo gomba dhayamita kushivirira inosiyana zvishoma zvichienderana nezvinhu, zvinowanzodzorwa mukati 0.05mm, uye hupamhi hwepadhi hudiki hahufanire kuve hushoma pane 0.2mm.
Pad-to-Pad Spacing
Nzvimbo yepakati pakati pemapedhi haifanire kunge iri pasi pe 0.2mm kune vakawanda vepamusoro PCB vagadziri.
Mhangura-kune-Bhodhi Edge Spacing
Kupatsanurana pakati penzvimbo dzemhangura mhenyu uye PCB mupendero haifanire kunge iri pasi pe 0.3mm. Izvi zvinogona kugadzirwa mune Dhizaini> Mitemo> Bhodhi Rondedzero zvirongwa.
Kune nzvimbo huru dzemhangura, chinhambwe chekudzokera kumashure kubva kumucheto webhodhi chinowanzodikanwa, kazhinji chinoiswa 0.2mm. Kuti udzivise nyaya dzakadai sekuratidzwa kwemhangura pamupendero webhodhi, izvo zvinogona kutungamira kuhondo kana zvipfupi zvemagetsi, mainjiniya anowanzo kupinza nzvimbo dzemhangura ne. 8 mairi (~ 0.2mm) kubva kumucheto pachinzvimbo chekuwedzera mhangura kusvika kumucheto.
Yakareruka nzira yeCopper Setback: Seta zvakajairika chengetedzo chinhambwe kuti bhodhi kuenda 0.25mm uye mhangura kuchengeteka kure 0.5mm. Izvi zvinoita kuti a 0.5mm kudzosera mhangura kubva kumucheto uye inobvisa mhangura yakafa mukati mezvikamu.
02 Nzvimbo dzisiri dzeMagetsi Dziviriro
Kufara Kwemavara, Kureba, uye Mupamhi
Firimu remavara harigone kuchinjwa panguva yekugadziriswa, asi mutsara wematsetse wakaita diki pane 0.22mm (8.66 ms) yakakora kusvika 0.22mm. Iwo akajairwa mavara mativi ndeaya:
- Upamhi hwemutsara (L): 0.22mm (8.66 mils)
- Hunhu hupamhi (W): 1.0mm
- Hurefu hwehunhu (H): 1.2mm
- Nharaunda pakati pemavara (D): 0.2mm
Mavara madiki pane aya anozoonekwa asina kujeka mushure mekugadzirisa.
Via-to-Via Spacing
Kupatsanurana pakati pe vias (kumucheto kusvika kumucheto) kunofanira kunge kwakakura kudarika 8 mairi.
Silkscreen-to-Pad Spacing
Silkscreen marking haifanire kupindirana mapedhi. Kuputira silkscreen kunodzivirira solder kuti isanamatira zvakanaka panguva yekushambadzira, zvichikanganisa kuiswa kwechikamu. A spacing of 8 mairi inokurudzirwa; 4 mairi inogamuchirwa mumagadzirirwo ane nzvimbo. Kana iyo silkscreen yakavhara padhi netsaona, mugadziri anozobvisa otomatiki chikamu chinopindirana kuti ave nechokwadi chekutengesa mhando.
Mune zvimwe zviitiko, silkscreen inogona kuiswa nemaune padhuze nemapadhi kudzivirira bhiriji rekutengesa pakati pemapadhi ari pedyo.
Mechanical 3D Kureba uye Horizontal Clearance
Kana uchiisa zvikamu paPCB, ita shuwa kuti hapana kupokana nemamwe mamechani zvimisikidzo mune ese akachinjika uye akatwasuka nzira. Funga nzvimbo pakati pezvikamu, iyo PCB, uye chigadzirwa casing. Chengetedza mvumo yakakwana kudzivirira kukanganiswa kwenzvimbo.
Nekuomerera kune aya ekuchengetedza madaro, unogona kuve nechokwadi chekugadzirwa, kuvimbika, uye kushanda kwePCB dhizaini yako.
