Anti-lalata shigarwa na buga kewaye hukumar sassa

1. A cikin firam ɗin ƙarfafawa da shigarwa na PCBA, PCBA da tsarin shigarwa na chassis, PCBA mai ruɗewa ko aiwatar da firam ɗin ƙarfafa kai tsaye ko tilasta shigarwa da PCBA shigarwa a cikin chassis mara kyau.Danniya na shigarwa yana haifar da lalacewa da rushewar abubuwan jagoranci (musamman maɗaukakin ICs kamar BGS da abubuwan haɗin saman dutse), ramukan watsa shirye-shiryen PCB masu yawa da layin haɗin ciki da pads na PCBs masu yawa.Zuwa warpage bai cika buƙatun PCBA ko firam ɗin da aka ƙarfafa ba, mai zane ya kamata ya yi aiki tare da mai fasaha kafin shigarwa a cikin sassan baka (karkatar da) don ɗauka ko ƙirƙira ingantattun matakan "kushin".

2. Nazari

a.Daga cikin abubuwan da ake iya amfani da guntu, yuwuwar lahani a cikin capacitors na guntuwar yumbu shine mafi girma, galibi masu biyowa.

b.PCBA ruku'u da nakasawa lalacewa ta hanyar danniya na waya dam shigarwa.

c.Flatness na PCBA bayan soldering ya fi 0.75%.

d.Ƙirar asymmetric na pads a ƙarshen ƙarshen yumbun guntu capacitors.

e.Utility gammaye tare da soldering lokaci fiye da 2s, soldering zafin jiki sama da 245 ℃, da kuma jimlar soldering sau wuce kayyade darajar 6 sau.

f.Daban-daban na haɓaka haɓaka haɓaka haɓakar thermal tsakanin yumbu guntu capacitor da kayan PCB.

g.Tsarin PCB tare da gyara ramukan da yumbu guntu capacitors kusa da juna yana haifar da damuwa yayin ɗaurewa, da sauransu.

h.Ko da yumbun guntu capacitor yana da girman kushin guda ɗaya akan PCB, idan adadin mai siyar ya yi yawa, zai ƙara yawan damuwa akan guntu capacitor lokacin da PCB ya lanƙwasa;daidai adadin solder ya zama 1/2 zuwa 2/3 na tsawo na solder karshen guntu capacitor

i.Duk wani na'ura na waje ko danniya na zafi zai haifar da fasa a cikin capacitors guntu yumbu.

• Cracks da ke haifar da extrusion na hawan sama da kan wuri zai bayyana a saman sashin, yawanci kamar zagaye ko rabin wata tare da canjin launi, a ciki ko kusa da tsakiyar capacitor.
• Fashewar da ba daidai ba saituna nakarba da wuri injisigogi.Shugaban karba-da-wuri na mai hawa yana amfani da bututun tsotsa ko matsawar tsakiya don sanya abun cikin, kuma matsananciyar axis na kasa na iya karya bangaren yumbura.Idan an yi amfani da babban ƙarfin da ya dace a kan ɗauka da sanya kai a wani wuri ban da tsakiyar yankin yumbura, damuwa da aka yi wa capacitor na iya zama babba don lalata bangaren.
• Zaɓin da bai dace ba na girman guntu pick da kan wuri na iya haifar da tsagewa.Karamin diamita karba da shugaban wuri zai mayar da hankalin wurin sanyawa yayin sanyawa, yana haifar da ƙaramin yanki mai ƙarfi na yumbu don fuskantar babban damuwa, yana haifar da fashe fashe capacitors.
• Adadin da ba daidai ba na solder zai haifar da rarraba damuwa a kan sashin, kuma a ƙarshen ɗaya zai damu da maida hankali da fashewa.
• Tushen ɓarna shine rashin ƙarfi da tsagewa tsakanin yadudduka na capacitors na yumbu da guntu na yumbu.

3. Matakan Magani.

Ƙarfafa nunin na'urorin capacitors na yumbu: Ana duba masu ƙarfin yumbura tare da microscope na nau'in C-SAM (C-SAM) da microscope na Laser acoustic microscope (SLAM), wanda zai iya nuna rashin lahani na yumbu capacitors.