Ndedzipi nyaya dzinofanira kutariswa mu PCB pads?

Padhi imhando yegomba, padhi dhizaini inofanirwa kutarisisa kune zvinotevera zvinhu.

1. Diameter uye mukati megomba saizi yepedhi: Iyo yemukati gomba repadhi kazhinji harisi pasi pe 0.6mm, nekuti hazvisi nyore kugadzirisa kana gomba riri pasi pe 0.6mm. Kazhinji, iyo dhayamita yepini yesimbi pamwe ne0.2mm inoshandiswa senge yemukati gomba dhayamita yepad. Kana iyo simbi pini dhayamita yekushomeka iri 0.5mm, yemukati gomba dhayamita yepad yacho iri 0.7mm, uye dhayamita yepad inoenderana neyemukati gomba dhayamita. Gomba dhayamita / padhi dhayamita kazhinji: 0.4 / 1.5; 0.5 / 1.5;0.6 / 2; 0.8 / 2.5; 1.0 / 3.0; 1.2 / 3.5; 1.6/4. Kana iyo dhayamita yepedhi iri 1.5 mm, kuti uwedzere simba rekubvisa pedhi, kureba kwepasi pe 1.5 mm, hupamhi hwe 1.5 mm kureba denderedzwa pad inogona kushandiswa, rudzi urwu rwepadhi rinonyanya kuwanikwa iyo pini pad ye integrated circuit. Nokuda kwehupamhi hwemapadhi kupfuura chiyero chetafura iri pamusoro, nzira inotevera inogona kushandiswa kusarudza: gomba rine dhayamita isingasviki 0.4mm: D/ D = 1.5-3; Makomba ane madhayamita anopfuura 2rran: D/ D =1.5-2 (apo: D ndiyo dhayamita yemapadhi uye D dhayamita remaburi emukati)

2. Nharaunda pakati pemucheto wegomba remukati wepadhi uye kumucheto kwebhodhi rakadhindwa rinofanira kuva rakakura kudarika 1 mm, kuitira kuti udzivise kukanganisa kwepadhi panguva yekugadzirisa.

3. Kana tambo yakabatana nepedhi inenge yakaonda, kuwirirana pakati pedhi uye tambo kunogadzirwa kuva chimiro chekudonha, izvo zvisiri nyore kupeta padhi, uye tambo uye padhi haisi nyore kubvisa.

4. Mapedhi akatarisana kuti adzivise muAcute Angle kana nzvimbo yakakura yefoil yemhangura. An acute Angle inokonzeresa kuomeswa kwemafungu, uye kune njodzi yekusunga bhiriji, nzvimbo huru yefoil yemhangura nekuda kwekunyanya kupisa kwekupisa kunotungamira mukuwomesa welding.