Solder Mask Bridge Zvinorevei uye Ungazvidzivirira Sei?

Chii chinonzi solder mask bhiriji?

A solder mask Bridge inoreva kubatana kusingatarisirwe kana kuenderera kwe solder mask zvinhu pakati pezviviri zviri padyo conductive zvinhu kana mapadhi paPCB. Iyo solder mask chigadziko chekudzivirira chinoiswa pamusoro pematehwe emhangura uye mapedhi paPCB kudzivirira solder kubva pakuyerera kwaasina kuitirwa panguva yekushambadzira.

Munguva yePCB yekugadzira, iyo solder mask inowanzo shandiswa kuvhara bhodhi rose, ichisiya mazaru kana "mahwindo" chete panowanikwa solder pads kana akafumurwa mhangura. Nekudaro, mune zvimwe zviitiko, nekuda kwekukanganisa kwekugadzira kana nyaya dzekugadzira, iyo solder mask inogona kupfuurira kupfuura nzvimbo yakatarwa uye kugadzira bhiriji kana chinongedzo pakati pepadhi padhi kana zviteshi.

Solder mask mabhiriji anogona kukonzera mapfupi maseketi kana kupindira pakati peyakavakidzana conductive zvinhu, zvichitungamira kune magetsi malfunctions kana kutadza mudunhu. Vanogona kunetsa, kunyanya mumhando yepamusoro-density dhizaini apo nzvimbo iri pakati pemapadhi kana zviteshi ishoma.

Kudzivirira solder mask mabhiriji, dhizaini dhizaini, maitiro ekugadzira, uye nhanho dzekudzora mhando dzinofanirwa kuteverwa. Vagadziri vanofanirwa kuona nzvimbo yakakwana pakati pemapadhi ari padyo, shandisa yakakodzera solder mask yekuzorora kana kuwedzera kukosha, uye kuita ongororo yakakwana uye kuyedza panguva yePCB kugadzira kuona nekugadzirisa chero zvingangoitika solder mask bridging issues.

Kuti PCB yako inobatwa sei neiyo solder masking process

Iyo solder masking process inoita basa rakakosha mukugadzira uye kuita kweakadhindwa edunhu mabhodhi (PCBs). Heano maitiro eiyo solder masking maitiro anokanganisa PCB yako:

1. Inodzivirira Solder Mask Bridges: Rimwe remabasa ekutanga eiyo solder mask ndeyekudzivirira solder mask mabhiriji. Inogadzira chipingamupinyi kana "dhamu rekutengesa" pakati pemajoini ekutengesa uye dzimwe nzvimbo dzinofambisa dzebhodhi. Izvi zvinodzivirira kushamwaridzana kusingatarisirwe pakati pezvinhu zvinoitisa, izvo zvinogona kutungamira mukukuvadzwa kwebhodhi kana mapfupi maseketi. Solder mask mabhiriji inyaya yakajairika panguva yePCB gungano, uye solder mask inobatsira kuderedza dambudziko iri.
2. Inoderedza Kushandiswa kweSolder Paste: Solder paste inoshandiswa panguva yekutengesa kugadzira magetsi. Iyo solder mask inoderedza kudiwa kwekunyanyisa solder paste nekupa insulation pakati pezvikamu zvebhodhi. Izvi hazvingochengetedze pamitengo yezvinhu asiwo zvinobatsira kudzivirira hurema hune chekuita nekutengesa.
3. Kuchengetedza PCB: Iyo solder mask inoshanda sechidziviriro chinodzivirira PCB kubva kune zvinosvibisa zvinogona kuunzwa panguva yekubata kana kusangana. Inoita sechivharidzo, kudzivirira huruva, tsvina, hunyoro, uye zvimwe zvinosvibisa kuti zvisasangana nezvinoitisa zvinhu zviri pamusoro pebhodhi. Kudzivirirwa uku kunogona kuwedzera hupenyu hwekushanda kwechigadzirwa.
4. Inowedzera Kuputsa Voltage: Iyo dielectric material inoshandiswa muPCBs ine breakdown voltage, inova ndiyo yakanyanya voltage yainokwanisa kumira pamberi pemagetsi arcing aitika. Nekushandisa iyo solder mask, unogona kuvandudza voltage yekuputsa yePCB. Izvi zvinonyanya kukosha kumabhodhi e-high-voltage (kupfuura 1 kV), sezvo inopa humwe hudziviriro kubva pakubuda kwekorona uye magetsi arcs.
5. Inodzivirira Metal Whisker Kuumbwa: Ndebvu dzesimbi zvidiki, zvakaita sebvudzi zvinokwanisa kumera pamusoro pemamwe simbi, kusanganisira tini. Vanogona kukonzera magetsi mapfupi uye mamwe matambudziko muzvikamu zvemagetsi. Iyo solder mask inobatsira kudzivirira kugadzirwa kwendebvu dzemarata, kunyanya muzvikamu zvine lead-isina solder uye tin plating. Nekuita sechivharo, iyo solder mask inoderedza njodzi yekuumbwa kwewhisker.

Pakazere, iyo solder masking process yakakosha pakuona kuvimbika uye kuita kwePCBs. Inogadzirisa nyaya dzakasiyana siyana, zvinosanganisira kudzivirira solder mask mabhiriji, kudzikisa solder paste kushandiswa, kuchengetedza PCB kubva kune zvinosvibisa, kuwedzera kuparara kwemagetsi, uye kuderedza njodzi yekuumbwa kwesimbi whisker. Nepo panogona kunge paine zviitiko apo solder mask isingaite, kazhinji inhanho yakakosha mukugadzira PCB kuve nechokwadi chekushanda uye hupenyu hurefu hwemidziyo yemagetsi. Kubvunzana nemugadziri wako wePCB (CM) zvinokurudzirwa kuti uongorore izvo chaizvo zvinodikanwa uye mhedzisiro ye solder mask application yePCB dhizaini yako.

Nyaya dzinowanzozivikanwa dzeSoldering Bridging

Solder bridging panguva ye soldering inogona kutungamira kune akati wandei anozivikanwa nyaya, kusanganisira:

Kunyudza uye Kusanyorovesa: Kunyudza kunoitika kana solder yakanyungudutswa ichivhara padhi asi yozodzokera shure, zvosiya gomo resolder. Kusanyorovesa, kune rumwe rutivi, kunoitika kana solder yakanyungudutswa ikasanyorovesa mhangura yakafumurwa padhi. Matambudziko aya anogona kumuka nekuda kwekusanyatsoiswa zvakanaka kwesimbi yemhangura kana kuti kudiwa kwekuchinja flux.

Maburi Emapini Nemaburi Ekufukudzira: Maburi emapani nemaburi ekufukudzira zvikanganiso zvinoitika kana paine copper plating isina kunaka kana hunyoro hwakawandisa pabhodhi. Maburi emapani madiki kana maburi ari mujoini resolder, nepo maburi ekufukudzira ari maburi makuru kana maburi anokonzerwa nehunyoro kana magasi akavharirwa.

Mapedhi Akasimudzwa: Mapedhi akasimudzwa anoitika kana chikamu chakasonerwa chabviswa uye pamusoro pechisonerwa paine plating yemhangura yakasakara kana isina kufanana. Izvi zvinogona kukonzera kuti mapedhi acho abve paPCB, zvichikonzera matambudziko ekubatanidza magetsi.

Matombo epamukuva: Kutema matombo kunoitika panguva yekusunga mafungu kana chikamu chikasimudzwa chomira chakamira chakamira, chakafanana nedombo repamukuva. Izvi zvinogona kukonzerwa nekushandisa zvikamu zvine hunhu hwakasiyana hwekusunga kana kushandisa matambo ane hurefu husina kunaka.

Kunyungudutsa Kwesimbi: Kuunganidzwa kwakanyanya kwesimbi kunogona kuitika nekuda kwezvinhu zvakaita sehukuru husina kunaka hwesimbi kana tichienzanisa nechiyero chepedhi kana kufamba nekukurumidza kwebhandi rekufambisa panguva yekunyungudutsa. Izvi zvinogona kutungamira kumabhiriji esimbi uye kunaka kwejoini resimbi.

Idzi nyaya dzinogona kukanganisa mashandiro, kuvimbika, uye mashandiro eiyo inotengeswa yekubatanidza paPCB. Kuti uderedze matambudziko aya, zvakakosha kutevedzera nzira dzakakodzera dzekutengesa, kuve nechokwadi chekuisa kwakaringana uye kuchena kwebhodhi, uye kushandisa zvikamu zvinopindirana nemaitiro ekutengesa. Pamusoro pezvo, nhanho dzekuongorora uye dzemhando yepamusoro dzinofanirwa kuitwa kuona uye kugadzirisa chero hurema hwekutengesa PCB isati yashandiswa mumidziyo yemagetsi.

Chii Chaunofanira Kuita Kuti Udzivise Solder Mask Bridges?

Kuti udzivise mabhiriji emasiki anosonerwa muPCB assembly yako , unogona kutevedzera matanho akakosha ekudzivirira mabhiriji emasiki anosonerwa muPCB assembly yako, unogona kutevedzera matanho akakosha ekudzivirira mabhiriji emasiki anosonerwa:

1. Simbisa PCB Dhizaini: Nyatsoongorora dhizaini yako yePCB kuti ive nechokwadi chekuti inosangana neakanakisa maitiro ekugadzira, kunyanya yekukwirisa pamusoro uye kuburikidza-buri-maburi. Kutevera zviyero zveindasitiri senge izvo zvinotsanangurwa neIPC (Institute for Printed Circuits) zvinogona kubatsira kuve nechokwadi chemhando yepamusoro dhizaini.
2. Dhizaini Mitemo yeMask Relief: Tarisa mitemo yekugadzira yekuyamura kwemask, kunyanya kunzvimbo uko solder mask application haidiwe. Rongedza hunhu hwekuyamura kune zviyero zvakakodzera, kazhinji pakati pe0.003 kusvika 0.008 inches yeSMT (Surface Mount Technology) zvikamu. Rongedza hunhu uhu sezvinodiwa, kunyanya kana uchishanda nemapedhi akaparadzana.
3. Alter Reflow Profile: Shandura iyo reflow profil panguva yekushambadzira. Rebesa nguva patembiricha pamusoro pepanonyungudika solder kubvumira mapedhi uye chikamu chinotungamira kusvika kune yaunoda tembiricha zvishoma nezvishoma. Uku kupisa zvishoma nezvishoma kunokurudzira kunyorova uye kunamatira pasina kugadzira mabhiriji ekutengesa.
4. Shandisa Solder Mask Dams: Shandisa solder mask madhamu pakati peSMT pads. Aya madhamu anoita semadziro ega ega kudzivirira solder kubva kupararira kupfuura nzvimbo dzakatarwa. Ita shuwa kuti hudiki saizi yedhamu yakakwana, kazhinji kutenderedza 0.004 inches. Gadzirisa saizi iyi zvichienderana nezvinodiwa zvekugadzira.
5. Funga Kureba Kwekutungamira kweKuburikidza neHole Zvikamu: Kuburikidza nemaburi, funga nezvehurefu hwakakodzera hwekutungamira. Zvinhu zvakaita sebhodhi ukobvu, saizi yechikamu, uye nzira yekusimbisa zvinogona kukanganisa kureba kunodiwa. Bvunza nemugadziri wako wePCB kuti uone hurefu hwakakodzera kudzivirira bhiriji.
6. Deredza Solder Paste Vhoriyamu: Kunyanya kushandisa solder paste kunogona kutungamira kune solder mask mabhiriji. Deredza vhoriyamu ye solder paste inoiswa kubhodhi kana gadzirisa iyo stencil dhizaini kudzora namatidza application nzvimbo, kunyanya munzvimbo dzine diki spacing pakati pezvikamu.
7. Shandisa Solder Mask Yakatsanangurwa Pads: Munzvimbo dzakasimba kana dzakaoma uko solder mask madhamu haagoneke, unogona kushandisa solder-mask-yakatsanangurwa pads kuchengetedza inosongedza nzvimbo. Iyi nzira inobatsira kudzivirira solder mask mabhiriji munzvimbo dzakavharirwa.
8. Yakakodzera Pad Diameter uye Hole Saizi: Ita shuwa kuti iwe unoshandisa yakakodzera padhi dhayamita uye gomba saizi muPCB yako dhizaini. Mapadhi makuru emhangura kana kuburikidza nemakomba ari pakati penzvimbo dzakanyatso paradzana anowedzera njodzi yemabhiriji anotengeswa.
9. Shandisa Solder Masking Zvakanaka: Iko kushandiswa kweiyo solder mask kwakakosha. Ita shuwa kuti solder mask inoiswa munzvimbo dzisingaite soldering. Solder mask zvinhu, kazhinji epoxy-based, kudzivirira solder yakanyungudutswa kubva pairi, kubatsira kudzivirira solder mask mabhiriji.
10. Shandisa Fiducials: Sanganisira fiducial mamaki pane yako PCB dhizaini. Aya mafiducial anobatsira mune chaiyo otomatiki chikamu chekuisa uye kurongeka panguva yegungano. Kuiswa kwakaringana kwechikamu kunoderedza mikana yezvimiro zvisina kurongeka zvinogona kutungamira kune solder mask mabhiriji.
11. Bata pamwe neane mukurumbira PCB Mugadziri: Shamwaridzana neane ruzivo uye ane mukurumbira PCB mugadziri. Tauriranai zvaunoda dhizaini, kusanganisira kudiwa kwekudzivirira solder mask mabhiriji, uye shanda padhuze nemugadziri kuona kuti yakanakisa maitiro anotevedzwa mukati mekugadzira uye magungano maitiro.

Nekutevera idzi dziviriro uye kushanda pamwe chete nemugadziri wako wePCB, unogona kuderedza zvakanyanya njodzi yemasolder mask mabhiriji uye kuve nechokwadi chemhando uye kuvimbika kwemagungano ako ePCB.

Unogona Kugadzirisa sei Solder mask mabhiriji

Kugadzirisa solder mask mabhiriji inzira yakatetepa inoda kushandiswa kwezvishandiso nehunyanzvi hwakakodzera. Heano maitiro aunokwanisa kugadzirisa solder mask mabhiriji nhanho nhanho:

Zvishandiso uye Zvishandiso Zvinodiwa:

• Soldering simbi ine yakanaka zano uye inogadziriswa tembiricha kutonga
• Solder wick (desolder braid)
• Solder flux
• Multimeter (inosarudza, yekuyedza)
• Siponji yakanyorova kana jira nyoro (yekuchenesa simbi yekunyungudutsa)

Nzira:

1. Gadzirira Simbi Yako Yekusongedza: Isa tembiricha pasimbi yako yekunyungudutsa kune yakakosha kukosha, kazhinji kutenderedza 150-250 ° C (300-480 ° F), zvichienderana nesolder uye zvikamu zvinoshandiswa. Bvumira simbi kuti isvike zvizere tembiricha iyi isati yaenderera.
2. Monitor Temperature: Ita shuwa kuti solder iron tip inosvika painodiwa tembiricha ye soldering. Ungangoda kuwedzera tembiricha nemadhigirii mashoma kuti uzvidavirire pakupinzwa kwekupisa newachi solder panguva yekugadzirisa. Somuenzaniso, kana uri soldering pa 250 ° C, unogona kuisa simbi kusvika 270 ° C.
3. Shandisa Surface Tension: Mune zvimwe zviitiko, unogona kushandisa tension yepasi peiyo solder yakanyungudutswa kubvisa solder mask bhiriji pasina kudiwa kwetambo. Kuti uite izvi, zvinyoronyoro bata bhiriji rekutengesa nemuromo wesimbi yesimbi. The pamusoro tension anofanira kukwevera yakawandisa solder kure kubva bridged nzvimbo. Chenjerera kuti usapisa PCB kana zvikamu.
4. Shandisa Solder Wick: Kana kushandisa tension yega yega isingabvisi zambuko, unogona kuenderera nekushandisa solder wick (desolder braid). Heino maitiro ekuzviita:
   • Isa shoma shoma ye solder flux kune solder mask bridge. Izvi zvichabatsira nekuyerera kwe solder uye kunyura.
   • Isa tambo yesolder yakananga pamusoro pebhiriji, kuve nechokwadi kuti inovhara nzvimbo yese yakabhurwa.
   • Isa solder iron tip pamusoro petambo, kushandisa zvinyoro kumanikidza kutamisa kupisa.
   • Kupisa kuchaita kuti solder iri pabhiriji inyunguduke uye ipinde mutambo. Fambisa simbi zvishoma nezvishoma kuvhara nzvimbo yese yezambuko.
5. Tsiva Yakavharwa Wick (kana zvichidikanwa): Kana iyo solder wick ikava yakavharwa neyakanyura solder, itsive nechikamu chitsva kuti uenderere mberi nemaitiro.
6. Chenesa Soldering Iron Tip: Nguva nenguva, chenesa muromo wesimbi yakanyungudutswa nekuipukuta pane chipanje chakanyorova kana jira rakanyorova. Zano rakachena rinovimbisa kufambisa kupisa kwakanaka panguva yekugadzirisa.
7. Ongorora Kugadzirisa: Mushure mekubvisa solder mask bhiriji, tarisa nzvimbo yacho kuti uone kuti yakachena uye isina mabhiriji anotengeswa. Iwe unogona zvakare kuda kuyedza kuenderera pakati peakambovharirwa mapoinzi uchishandisa multimeter mukuenderera mberi modhi.
8. Shandisazve Solder (kana zvichidikanwa): Kana kubvisa bhiriji kunoguma nekubviswa kwejoint ye solder, shandisa imwe solder kuti ugadzirise zvakare yakachena uye yakasimba solder kubatana pakati pezvikamu.

Rangarira kungwarira uye kurongeka panguva yekugadzira bhiriji rekutengesa mask kuitira kudzivirira kukuvadza PCB kana zvikamu. Kana iwe usina chivimbo muhunyanzvi hwako hwekusodha, funga kutsvaga rubatsiro kubva kune ane hunyanzvi kana hunyanzvi hwekugadzirisa zvemagetsi sevhisi.

kugumisa

Kazhinji, mabhiriji emasiki esimbi anogona kukanganisa mabhodhi emagetsi nekuda kwekugona kwemagetsi mapfupi. Zvakakosha kutevedzera matanho ekudzivirira ataurwa kare kuti asaitike. Zvisinei, kana mabhiriji emasiki esimbi akaitika, zvakakosha kuti agadziriswe nekukurumidza. Izvi zvinogona kusanganisira kunyatsoongorora nzvimbo dzakakanganiswa, kubvisa masiki esimbi akawandisa uchishandisa maturusi akakodzera senge tambo yesimbi kana solder sucker, uye kuve nechokwadi chekuti solder joint inoyerera zvakanaka kana kugadzirisa patsva. Kana zvichidikanwa, kubvunza nyanzvi ine ruzivo kana mugadziri wePCB kunogona kupa nhungamiro nerubatsiro mukugadzirisa matambudziko emasiki esimbi esimbi zvinobudirira. Nekutora matanho nekukurumidza, unogona kuderedza kukanganisa kwakaipa kunogona kuitika kwemabhiriji emasiki esimbi esimbi pabhodhi rako remagetsi.