1. Mtundu wa Plum.

1: Bowo lokonzekera liyenera kukhala lopanda zitsulo. Panthawi yowotchera mafunde, ngati dzenje lokonzerako ndi dzenje lazitsulo, malata amatsekereza dzenjelo panthawi ya soldering.

2. Kukonza mabowo omangika ngati mapadi a quincunx nthawi zambiri amagwiritsidwa ntchito pokweza maukonde a GND, chifukwa nthawi zambiri PCB yamkuwa imagwiritsidwa ntchito kuyala mkuwa pa netiweki ya GND. Pambuyo poyika mabowo a quincunx ndi zigawo za chipolopolo cha PCB, kwenikweni, GND imalumikizidwa ndi dziko lapansi. Nthawi zina, chipolopolo cha PCB chimagwira ntchito yoteteza. Zachidziwikire, ena safunikira kulumikiza dzenje lokwera ku netiweki ya GND.

3. Bowo la zitsulo zachitsulo likhoza kufinyidwa, zomwe zimapangitsa kuti malire a zero akhazikike pansi ndi kusasunthika, zomwe zimapangitsa kuti dongosololi likhale lachilendo. Bowo la maluwa a plum, ziribe kanthu momwe kupsinjika kusinthira, kumatha kusunga wononga nthawi zonse.

2. Mtanda wamaluwa.

Mapiritsi a maluwa odutsa amatchedwanso matenthedwe amafuta, mapepala otentha otentha, etc. Ntchito yake ndi kuchepetsa kutentha kwa pad panthawi ya soldering, kuti ateteze kutsekemera kwapadera kapena PCB peeling chifukwa cha kutentha kwakukulu.

1 Pamene pedi yanu yaphwa. Njira ya mtanda ikhoza kuchepetsa dera la waya pansi, kuchepetsa kuthamanga kwa kutentha kwa kutentha, ndikuthandizira kuwotcherera.

2 Pamene PCB yanu imafuna makina oyika makina ndi makina opangira reflow, pad-pattern pad ingalepheretse PCB kusenda (chifukwa kutentha kwakukulu kumafunika kusungunula phala la solder)

3. chothira misozi

Misozi ndi kulumikizana mochulukirachulukira pakati pa pedi ndi waya kapena waya ndi via. Cholinga cha teardrop ndikupewa malo olumikizirana pakati pa waya ndi pedi kapena waya ndi kudzera pomwe bolodi ladera likukhudzidwa ndi mphamvu yayikulu yakunja. Chotsani, kuwonjezera, kuyika misozi kungapangitsenso gulu la dera la PCB kuwoneka lokongola kwambiri.

Ntchito ya teardrop ndikupewa kuchepa kwadzidzidzi kwa mzere wa mzere wa chizindikiro ndikuwonetsetsa, zomwe zingapangitse kugwirizana pakati pa kufufuza ndi chigawocho kukhala kusintha kosalala, ndikuthetsa vuto kuti kugwirizana pakati pa pedi ndi trace ndiko. mosavuta wosweka.

1. Pamene soldering, imatha kuteteza pad ndikupewa kugwa kwa pedi chifukwa cha soldering angapo.

2. Limbikitsani kudalirika kwa kugwirizana (kupanga kungapewe kukhazikika kosagwirizana, ming'alu yomwe imayambitsidwa ndi kupatuka, etc.)

3. Impedans yosalala, kuchepetsa kulumpha lakuthwa kwa impedance

Pamapangidwe a bolodi la dera, pofuna kuti pad ikhale yolimba komanso kuti pad ndi waya zisawonongeke panthawi yopanga makina a bolodi, filimu yamkuwa nthawi zambiri imagwiritsidwa ntchito pokonza malo osinthira pakati pa pedi ndi waya. , yomwe imapangidwa ngati misozi, choncho nthawi zambiri imatchedwa Misozi (Misozi)

4. zida zotulutsa

Kodi mwawonapo magetsi a anthu ena akusungitsa dala zojambulazo zopanda mkuwa pansi pa inductance wamba? Kodi zotsatira zake n'zotani?

Izi zimatchedwa kutulutsa dzino, kutulutsa mpweya kapena phokoso lamoto.

Mpata wa spark ndi awiri a makona atatu okhala ndi ngodya zakuthwa zolozerana. Mtunda waukulu pakati pa zala ndi 10mil ndipo osachepera ndi 6mil. Mtsinje umodzi umayikidwa pansi, ndipo winawo amalumikizidwa ndi mzere wamakina. Makona atatuwa si gawo, koma amapangidwa pogwiritsa ntchito zigawo zamkuwa za zojambulazo mu njira ya PCB. Makona atatuwa amayenera kukhazikitsidwa pamwamba pa PCB (chigawochi) ndipo sangaphimbidwe ndi chigoba cha solder.

Pakuyesa kwamagetsi osinthira magetsi kapena kuyesa kwa ESD, ma voliyumu apamwamba amapangidwa kumapeto kwa ma inductor wamba wamba ndipo ma arcing adzachitika. Ngati ili pafupi ndi zipangizo zozungulira, zipangizo zozungulira zikhoza kuwonongeka. Chifukwa chake, chubu chotulutsa kapena varistor amatha kulumikizidwa mofananira kuti achepetse mphamvu yake, potero amasewera gawo la kuzimitsa kwa arc.

Zotsatira za kuyika zida zoteteza mphezi ndizabwino kwambiri, koma mtengo wake ndi wokwera kwambiri. Njira ina ndikuwonjezera mano otulutsa kumapeto onse a makina ojambulira wamba panthawi ya mapangidwe a PCB, kuti inductor atulutse nsonga ziwiri zotulutsa, kupewa kutulutsa kudzera m'njira zina, kuti zozungulira ndi chikoka cha zida zamtsogolo zichepe.

Kusiyana kwa kutulutsa sikufuna ndalama zowonjezera. Itha kukokedwa pojambula bolodi la pcb, koma ndikofunikira kuzindikira kuti mtundu uwu wa kusiyana kotulutsa ndi mpweya wamtundu wa mpweya, womwe ungagwiritsidwe ntchito pamalo omwe ESD imapangidwa nthawi zina. Ngati igwiritsidwa ntchito nthawi zomwe ESD imapezeka pafupipafupi, ma depositi a kaboni amapangidwa pamagawo awiri am'makona atatu pakati pa mipata yotulutsa chifukwa chotuluka pafupipafupi, zomwe pamapeto pake zimabweretsa kufupikira kwakanthawi kotulutsa ndikupangitsa kuti chizindikirocho chikhale chachifupi. mzere pansi. Zimayambitsa kulephera kwadongosolo.