Vazhinji DIY vatambi vanozoona kuti akasiyana bhodhi zvigadzirwa pamusika zvinoshandisa dzungu dzakasiyana dzePCB mavara.
Iwo akajairika PCB mavara matema, girini, bhuruu, yero, yepepuru, tsvuku, uye brown.
Vamwe vagadziri vakagadzira chena, pink uye mamwe mavara akasiyana ePCB.

Muchinyakare fungidziro, dema PCB inoita kunge yakamira kumagumo, nepo tsvuku, yero, nezvimwewo, iyo yakaderera-magumo yakatsaurirwa, ndizvo here?

Iyo mhangura yemhangura yePCB isina solder resistance coating oxidizes nyore kana yaiswa kumhepo

Isu tinoziva kuti zvese kumberi nekumashure kwePCB zvidimbu zvemhangura.Mukugadzirwa kwePCB, mhangura yemhangura ichava nenzvimbo yakatsetseka uye isina kudzivirirwa zvisinei kuti inogadzirwa nekuwedzera kana kubvisa nzira.

Kunyange zvazvo chemikemikari yemhangura isingashande sealuminium, iron, magnesium, asi pamberi pemvura, mhangura yakachena uye oksijeni kusangana zviri nyore kuve oxidized;
Nekuda kwekuvapo kweokisijeni nemhute yemvura mumhepo, pamusoro pemhangura yakachena inozosangana nekuita oxidation mushure mekusangana nemhepo.

Sezvo ukobvu hwemhangura yemhangura muPCB yakanyanya kutetepa, iyo oxidized mhangura inova isina kunaka conductor yemagetsi, izvo zvinokuvadza zvakanyanya kushanda kwemagetsi kwePCB yese.

Kudzivirira mhangura oxidation, kuparadzanisa zvikamu zvakasungwa uye zvisina-welded zvePCB panguva yekuputika, uye kudzivirira pamusoro pePCB, mainjiniya akagadzira chipfeko chakakosha.
Iyo yekupfekedza inogona kuiswa nyore nyore pamusoro pePCB, ichigadzira chidziviriro chehumwe ukobvu uye ichivharira mhangura kubva kumhepo kusangana.
Iyi layer yekupotera inodaidzwa kuti solder resistance layer uye zvinhu zvinoshandiswa ndeye solder resistance pendi.

Sezvo ichinzi pendi, panofanira kunge paine mavara akasiyana.
Hongu, iyo yepakutanga solder resistance pendi inogona kunge isina ruvara uye yakajeka, asi PCB inowanzoda kudhindwa pabhodhi kuitira kuti ive nyore kugadzirisa nekugadzira.

Transparent solder resistance pendi inogona kungoratidza PCB yekumashure ruvara, saka ingave yakagadzirwa, yakagadziridzwa kana kutengeswa, kutaridzika hakuna kunaka.
Saka mainjiniya anowedzera mavara akasiyana-siyana kune solder kuramba pendi kugadzira dema kana tsvuku kana yebhuruu PCB's.

 
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Black PCBs dzakaoma kuona wiring, izvo zvinoita kuti kugadzirisa kunetse

Kubva pakuona uku, ruvara rwePCB haruna chekuita nemhando yePCB.
Musiyano uripo pakati pePCB nhema uye yebhuruu PCB, yero PCB uye imwe ruvara PCB iri muruvara rwakasiyana rwependi yekupikisa solder pabhurashi.

Kana iyo PCB yakagadzirwa uye yakagadzirwa zvakangofanana, iyo ruvara haizove nemhedzisiro pakuita, uye haizove nemhedzisiro pakupisa kupisa.

Kana iri PCB nhema, wiring yayo yepasi inenge yakavharwa zvachose, zvichikonzera kuoma kukuru kwekugadzirisa gare gare, saka ivara risina kunaka kugadzira nekushandisa.

Nokudaro, mumakore achangopfuura, vanhu vanochinja zvishoma nezvishoma, vanorega kushandiswa kwependi yakasviba solder, uye kushandisa rima rakasvibirira, rakasvibirira, rima rebhuruu uye mamwe mashizha anopikisa pendi, chinangwa ndechekufambisa kugadzira nekugadzirisa.

Panguva ino, isu takanyatso kujeka nezve dambudziko rePCB ruvara.
Chikonzero chekuonekwa kwe "mumiriri wemavara kana giredhi yakaderera" imhaka yekuti vagadziri vanofarira kushandisa dema PCB kugadzira zvigadzirwa zvepamusoro, uye tsvuku, bhuruu, girini, yero uye zvimwe zvigadzirwa zvepasi-giredhi.

Kupfupikisa, chigadzirwa chinopa zvinoreva ruvara, kwete ruvara runopa zvinoreva chigadzirwa.

Ko simbi yakakosha yakaita segoridhe, sirivheri inobatsirei nePCB?
Ruvara rwakajeka, ngatitaure nezve simbi yakakosha paPCB!
Vamwe vanogadzira mukusimudzira zvigadzirwa zvavo vanozotaura zvakananga kuti zvigadzirwa zvavo zvakashandisa goridhe, sirivheri plating uye mamwe maitiro akakosha.
Saka chii chiri kushandiswa kwemaitiro aya?

Pamusoro pePCB inoda welding zvinhu, uye chikamu chemhangura yemhangura inodiwa kuti ibudiswe pachena kune welding.
Aya akafukidzwa zvidimbu zvemhangura anonzi mapedhi, uye mapedhi anowanzo kuita rectangular kana denderedzwa uye ane nzvimbo diki.

Pamusoro, tinoziva kuti mhangura inoshandiswa muPCB iri nyore oxidized, saka mhangura pane solder pad inoratidzirwa kumhepo kana solder resistance pendi inoshandiswa.

Kana iyo mhangura iri padhi yakasvibiswa, haina kuoma chete weld, asiwo inowedzera resistivity, iyo inokanganisa zvakanyanya kushanda kwechigadzirwa chekupedzisira.
Saka mainjiniya vauya nemhando dzese dzenzira dzekudzivirira mapedhi.
Zvakadai sekuisa goridhe inert inert, kemikari kuvhara pamusoro nesirivheri, kana kuvhara mhangura nefirimu yakakosha yemakemikari kudzivirira kusangana nemhepo.

Iyo yakafumurwa padhi paPCB, iyo yemhangura layer inoratidzwa zvakananga.
Ichi chikamu chinoda kuchengetedzwa kuti chisaite oxidized.

Kubva pakuona uku, ingave yegoridhe kana sirivha, chinangwa chegadziriro yacho pachayo ndechekudzivirira oxidation uye kuchengetedza mapedhi kuitira kuti vagone kuve nechokwadi chegoho rakanaka panguva inotevera yekugadzira.

Nekudaro, kushandiswa kwesimbi dzakasiyana kunoda nguva yekuchengetedza uye mamiriro ekuchengetedza ePCB anoshandiswa mukugadzira chirimwa.
Naizvozvo, mafekitori ePCB anowanzo shandisa vacuum yekuisa chisimbiso muchina kurongedza PCB isati yapera kugadzirwa kwePCB uye kuendesa kune vatengi kuona kuti hapana kukuvadzwa kweoxidation kunoitika kuPCB kusvika kumagumo.

Zvikamu zvisati zvasungwa pamushini, vagadziri vemakadhi ebhodhi vanofanirwawo kuona dhigirii reoxidation yePCB, kubvisa oxidized PCB, uye kuve nechokwadi chegoho rezvigadzirwa zvakanaka.
Mutengi wekupedzisira kuti atore kadhi rebhodhi, ari kuburikidza nemiedzo yakasiyana-siyana, kunyange mushure menguva yakareba yekushandiswa, oxidation inenge ichingoitika chete mupuragi uye unplug yekubatanidza zvikamu, uye pamapedhi uye yakave yakashongedzwa zvikamu, pasina kukanganisa.

Sezvo kushorwa kwesirivha negoridhe kwakadzikira, kushandisa simbi dzakakosha sesirivha negoridhe kunoderedza kupisa kunoitwa panguva yekushandiswa kwePCB?

Tinoziva kuti chinhu chinokanganisa calorific kukosha ndechekupikisa magetsi.
Resistance uye conductor pachayo zvinhu, conductor cross-sectional area, kureba kwakabatana.
Pad pamusoro pesimbi ukobvu hwakatonyanya kuderera kupfuura 0.01 mm, kana kushandiswa kweOST (organic inodzivirira firimu) kurapwa kwepadhi, hakuzove nekuwanda ukobvu.
Kupikisa kunoratidzwa nehupamhi hudiki hwakadaro hunenge zero, kana kuti hazvibviri kuverenga, uye zvechokwadi hazvikanganisi kupisa.