Unogona kunzwa solder mask inonzi mazita akasiyana mumagetsi. Tafura iri pazasi inoratidza mamwe mazita akajairika:
Zita Rakasiyana | tsananguro |
|---|---|
Solder mask | Iro rakatetepa sependi yakaiswa paPCBs. |
Solder stop mask | Rimwe zita re solder mask. |
Solder kuramba | Zvinoreva zvakafanana ne solder mask. |
Coverlay | Inoshandiswa kumapuranga anogona kukotama. |
Solder mask inovhara mitsara yemhangura pane yako redunhu board. Inobatsira kudzivirira mhangura uye inomisa solder kubva pakugadzira mabhiriji. Iyi layer inoita kuti bhodhi rako rishande zvirinani nekumisa ngura nekukuvadza. Zvidzidzo zvinoratidza solder mask inomisa zvikabudura zvemagetsi uye inochengeta bhodhi rako rakachengeteka kwenguva yakareba.
Zvitsva Zvitsva
Solder mask inochengetedza nzira dzemhangura dzakachengeteka paPCBs. Inomisa kukanganisa uye ngura. Izvi zvinobatsira PCB kushanda zvakanaka.
Solder mask inoderedza mukana we solder mabhiriji. Solder mabhiriji anogona kuita mapfupi maseketi. Zvinokonzerawo kukanganisa pakuisa zvikamu pamwechete.
Kune marudzi akasiyana-siyana e solder mask. Liquid Photoimageable uye Dry Firimu mienzaniso miviri. Mhando yega yega ine mapoinzi ayo akanaka. Mamwe anodhura zvishoma, mamwe anokurumidza kushandisa, uye mamwe anogara kwenguva refu.
Kutora iyo chaiyo solder mask ukobvu kwakakosha zvakanyanya. Inobatsira kuchengetedza zviratidzo zvakasimba. Inomisawo matambudziko mumagadzirirwo epamusoro-frequency.
Solder mask inouya mune akawanda mavara. Rudzi rumwe norumwe rune kushandiswa kwakakosha. Mamwe mavara anoderedza ruzha. Vamwe vanoita kuti zvive nyore kuona panguva yekuongorora.
Solder Mask Overview
Chii chinonzi Solder Mask
A solder mask layer ijasi rakatetepa pamatehwe emhangura. Iyi nhete inoshanda senhoo yendarira. Inochengetedza mhangura kubva pakukuvadza uye inomisa solder kubva pakupararira. Zvinhu zvakasiyana-siyana zvinoshandiswa kugadzira iyi layer. Tafura iri pazasi inonyora mhando huru dzinoshandiswa mukugadzira PCB:
Solder Mask Type | tsananguro |
|---|---|
Epoxy Liquid | Iyi ndiyo mhando yakachipa uye inoiswa nesikikirini. |
Liquid Photo-Imageable Solder Mask | Ingi iyi inogona kupfapfaidzwa kana silkscreened, zvino inoda chiedza uye budiriro. |
Dry-Film Photo-Imageable Solder Mask | Rudzi urwu runoshandisa vacuum lamination pamberi pechiedza uye kusimudzira kune chaiyo mhangura layer. |
Mazhinji mapuranga anoshandisa green solder mask, asi chena uye dema zvakare zvakajairika. Yese PCB inoda mask solder, zvisinei kuti yakapusa sei kana yepamusoro.
Mabasa Akakosha uye Mabhenefiti
Solder mask inoita zvinopfuura kungotaridzika zvakanaka. Inopa bhodhi rako zvakawanda zvakakosha mabhenefiti:
Inomisa mabhiriji ekutengesa pakati pemapedhi epedyo, izvo zvakakosha pakugadzira madhizaini.
Inoshanda semadziro kuvhara zvisingadiwe solder kubatana.
Inodzivirira mhangura kubva kumarara uye kukanganisa, saka bhodhi rako rinoshanda zvakanaka.
Inomira kumakemikari akasimba uye kupisa kwakanyanya panguva ye soldering nekuchenesa.
Inopa simba rekudzivirira kwemagetsi, kazhinji pamusoro pe500V pa mil.
Inogara yakasimba uye inoramba kukuvara, saka bhodhi rako rinogara kwenguva refu.
Inonamira zvakasimba kubhodhi, saka haina peel kana kuputika.
Zano: Kana iwe ukasvetuka solder mask mune yakazara PCB dhizaini, iwe unowana mamwe mabhiriji ekutengesa, kushomeka kwechokwadi, uye kuderera kuvimbika.
Tafura iri pazasi inoratidza zvimiro zvemakemikari zvinoita kuti solder mask ishande nemazvo:
pfuma | tsananguro |
|---|---|
Chemical Nemishonga | Inomira kumakemikari akasimba anoshandiswa mukutengesa nekuchenesa, saka haiputsi. |
Thermal Kugadzikana | Inobata kupisa kwakanyanya panguva ye soldering, kazhinji kusvika ku 260 ° C kwenguva pfupi. |
Kuisa Magetsi | Inopa insulation yakasimba, kazhinji pamusoro pe500V pamil. |
mukurumari | Inoramba kukanganisa, kuchengetedza bhodhi yakasimba kwenguva yakareba. |
Adhesion | Inonamira zvakanaka kubhodhi nemhangura, saka haina peel kana kuputika. |
Solder mask inodzivirirawo kubva pamoto nemvura. Inomira kune zvinonyungudutsa uye inochengetedza ruvara rwayo kunyange nekupisa.
Nei Solder Mask Inobata muPCB Manufacturing
Kushandisa a solder mask layer inokubatsira kugadzira mamwe mabhodhi akanaka. Iyo maski inomisa solder mabhiriji, ayo anogona kukonzera mapfupi nemidziyo yakaputsika. Inobatsira solder kunamatira chete kune nzvimbo dzakakodzera, saka pane zvikanganiso zvishoma. Iyo yakanaka solder mask inogona kucheka kukanganisa kwegungano kusvika pa90%.
Solder mask inomisa mapfupi maseketi uye inochengeta mhangura kubva kuita ngura.
Inobatsira solder kuenda kunzvimbo dzakakodzera, zvichiita kuti gungano rive nani.
Iyo mask inobatsira kudzora kupisa uye inoita kuti chiedza chiratidze zviri nani, izvo zvakakosha kumapuranga e LED.
Kana ukasashandisa solder mask mumadhizaini akazara, unowana mamwe matambudziko. Iwe uchaona mamwe mabhiriji ekutengesa, kushomeka kwechokwadi, uye kuderera kwekuvimbika. Nyanzvi dzinoti solder mask ndiyo imwe yedzakanakisa nzira dzekuchengetedza maPCB.
Mhando uye Mavara eSolder Mask
Liquid Photoimageable (LPI)
Liquid Photoimageable solder mask inoshandiswa mumafekitori mazhinji ePCB. Mhando iyi inoshandisa mvura inooma kana UV mwenje yairova. Iwe unogona kuiisa nekukurumidza, kazhinji mukati memaminitsi makumi matatu. LPI inodhura zvishoma, inenge 20-30% yakachipa pane dzimwe sarudzo. Iyo layer inogona kuita 0.5 kusvika 1.5 miriyoni gobvu. Inopa ruzivo rwakakwana, anenge 4-5 mils, izvo zvakanaka kune akajairwa mabhodhi. LPI inogona kutsemuka kana kupepeta kana bhodhi rikamanikidzwa, saka funga nezve kwauchashandisa bhodhi rako.
pfuma | Liquid Photoimageable (LPI) | Mamwe Mhando (semuenzaniso, Dry Film) |
|---|---|---|
Mutengo-Kubudirira | Pasi | Yakakwirira |
Kumhanya Kwekushandisa | Kurumidza | Zvishoma nezvishoma |
Ukobvu Consistency | dzinosiyana | Zvakawanda zvinoenderana |
Resolution | eresera | Yakakwirira |
mukurumari | shoma yakasimba | Yakawedzera kusimba |
Dry Film uye Peelable Types
Dry film solder mask inoshandisa yakakosha layer inobata kuchiedza. Unoiisa ne vacuum lamination. Izvi zvinoita kuti ukobvu huve hwakafanana uye ruzivo ruve rwakapinza. Peelable solder mask inodzivirira mamwe mavara panguva yeave soldering uye plating. Iwe unogona kuishandisa kuvhara zvigunwe zvegoridhe uye zvibatanidza kubva kune solder nemakemikari.
Inodzivirira panguva wave soldering
Masks ekushongedza kwakakosha uye basa repamusoro
Inochengeta nzvimbo dzakatengeswa dzakachengeteka mumatanho akawanda ekudzoreredza
Inodzivirira zvigunwe zvegoridhe uye zvinobatanidza
Solder Mask Colors uye Mashandisiro Avo
Iwe unogona kutora kubva kune akawanda solder mask mavara. Green inonyanya kufarirwa nekuti inoratidza mhangura uye silkscreen zvakajeka. Bhuruu yakanaka kune yakakwirira-frequency mabhodhi uye inodzikisa ruzha. Tsvuku iri nyore kuona yekutarisa mabhodhi. Yero inopenya uye inobatsira neprototypes. Dema rinotaridzika kutonhorera uye rinocheka pasi pamasaini emagetsi. White bounces chiedza, saka inoshanda zvakanaka kumabhodhi e LED. Purple inomira pachena uye yakanaka pakuisa branding.
ruvara | Advantages | payakaipira |
|---|---|---|
Girinhi | Zviri nyore kuona, zvakachipa, zvinowanikwa kwese kwese | Kwete yakakosha |
Bhuruu | Inoderedza ruzha, yakanaka kune yakakwirira-frequency | Mari yakawanda, kwete yakajairika |
Tsvuku | Zviri nyore kutarisa, zvakanaka kuti zviongororwe | Mari yakawanda, kwete yakajairika |
Yero | Yakapenya, yakanaka kune prototypes | Zvakaoma kuona, hazviwanikwi zvakanyanya |
Nhema | Inotaridzika zvakanaka, inodzikisa masaini | Zvakaoma kuona, zvinodhura zvakanyanya |
Chena | Bounces chiedza, chinotaridzika chakachena | Inoita tsvina, yakaoma kuona |
Pepuru | Inomira kunze, yakanaka kune branding | Zvakaoma kuwana, zvinodhura zvakawanda |
Solder Mask Application Maitiro
Maitiro Ekushandisa
Iwe unofanirwa kutevera nzira yekungwarira yekushandisa iyo solder mask layer panguva yekugadzira PCB. Nhanho imwe neimwe inobatsira iwe kuwana yakasimba uye yakavimbika kupera. Heano matanho makuru:
Chenesa nzvimbo yePCB. Bvisa guruva nemafuta kuitira kuti solder mask inonamira zvakanaka.
Isa iyo solder mask zvinhu. Shandisa screen printing, spraying, kana lamination.
Tsanangura muenzaniso. Isa photomask pamusoro pebhodhi uye vhenekera UV mwenje kumaka panofanira kugara iyo solder mask.
Gadzirisa mask solder. Shandisa kupisa kana UV mwenje kuomesa layer.
Ongorora uye tarisa kunaka. Tarisa mabubbles, peeling, kana nzvimbo dzakapotsa.
Zano: Kunyatsocheneswa nekuwongorora kunokubatsira kudzivirira kukanganisa kwakajairika senge mabhuru, kusanamira zvakanaka, kana kukwenya.
Negative Output uye Exposed Pads
Iwe unoda kuti solder inamire chete kunzvimbo dzakakodzera. Iyo yakaipa yekubuda maitiro inokubatsira kuita izvi. Iyo inochengeta mapedhi asina kuvhurika panguva ye solder mask application. Izvi zvinomepu iyo solder mask saka chete mapedhi emhangura anogara akafumurwa. Iwe unowana zvirinani solder majoini nekuti iyo mask haina kuvhara mapadhi. Iyi nhanho yakakosha pakudzivirira kukanganiswa kwe solder uye kuve nechokwadi chekuti bhodhi rako rinoshanda nemazvo.
Iyo yakaipa yekuburitsa maitiro inosiya mapedhi akavhurika kuti atengeserwe.
Inokubatsira kudzivirira kufukidza mhangura pads ne solder mask layer.
Iwe unowana chaiyo mepu, saka solder inongoenda kwaunoda.
DFM Mirayiridzo yeSolder Mask
Dhizaini Yekugadzira (DFM) inokubatsira iwe kugadzira mabhodhi ari nani. Tevedza aya madhizaini kukwenenzvera yako solder mask dhizaini:
Ita shuwa kuti solder mask inovhara nzvimbo yakakwana uye inosiya gap re 0.1 kusvika 0.15 mm rakatenderedza mapedhi. Izvi zvinomisa mabhiriji anotengeswa.
Sarudza iyo chaiyo solder mask mhando. Shandisa NSMD pads kune yakanaka-pitch zvikamu uye tende vias kumisa solder kubva kuyerera kure.
Chengetedza iyo solder mask ukobvu pakati pe0.01 mm uye 0.03 mm. Liquid photoimamageable masks anoshanda zvakanyanya kune akaomarara mabhodhi.
Bvisa solder mask kubva kunopisa uye chengeta pad-to-pad mabhiriji angangoita 4 ms yakafara.
Tarisa dhizaini yako nePCB mugadziri wako. Ita shuwa kuti mafaera ako anoenderana nemitemo yavo.
Solder Mask Standards uye Ukobvu
Industry Standards (IPC, UL)
Iwe unofanirwa kutevera mitemo yakakosha paunenge uchishandisa solder mask pamapuranga ematunhu. Iyi mitemo inobatsira bhodhi rako kugara rakachengeteka uye kushanda zvakanaka. Mapoka maviri makuru anoita mitemo iyi: IPC neUL. IPC mitemo inokuudza nzira yekupfeka uye kuyedza solder mask. Mitemo yeUL inoongorora kuchengeteka, sekumisa moto.
Heino tafura ine akanyanya kukosha IPC mitemo ye solder mask:
Standard | Nzvimbo yekutarisa |
|---|---|
IPC-SM-840 | Inoisa mitemo yekuti solder mask inofanira kushanda sei uye yekupedzisira. |
IPC-6012 | Inoisa mitemo yekuti maPCB akasimba sei uye akaomarara sei. |
IPC-A-600 | Inoisa mitemo yekuti maPCB anofanira kutaridzika sei uye chii chakanaka, kusanganisira solder mask. |
Iwe unofanirwa kubvunza wako PCB mugadziri wemitemo yavanoshandisa. Izvi zvinokubatsira kudzivirira matambudziko paunenge uchigadzira bhodhi rako.
Typical Ukobvu Ranges
Ukobvu hwemasolder mask hwakakosha kubhodhi rako. Ukobvu hwakarurama hunodzivirira mhangura uye hunoita kuti solder iri panzvimbo. Kana yakanyanya kukora kana kutetepa, bhodhi rako rinogona kusashanda nemazvo.
Mapuranga mazhinji anoshandisa solder mask inokora 0.8 kusvika 1.5 mils (20 kusvika 38 micrometers). Tafura iri pazasi inoratidza ukobvu hwakajairika:
Rudzi rwekushandisa | Ukobvu Range (mils) | Ukobvu Range (micrometers) |
|---|---|---|
General Use | 0.8 - 1.5 | 20 - 38 |
Dzimwe nzvimbo dzinoda ukobvu hwakasiyana:
Pamusoro pemitsara yedunhu: inenge 0.5 mils kana kupfuura
Pamusoro pemakona mumasekete: anenge 0.3 mils
Masikirini akadhindwa masks akakora pane ekupfapfaidza
Solder mask ukobvu inoshandura mafambiro anoita masaini pabhodhi rako. Iyo gobvu layer inogona kuita kuti capacitance iende kumusoro uye impedance iende pasi. Iro rakatetepa rinogona kuita kuti impedance iende kumusoro. Kana ukobvu huchichinja zvakanyanya, masaini anogona kusashanda nemazvo, kunyanya mumaseketi anokurumidza.
Zano: Gara uchibvunza wako PCB mutengesi nezve akanakisa solder mask ukobvu kubhodhi rako. Izvi zvinobatsira bhodhi rako kushanda zvirinani uye kugara kwenguva refu.
Basa reSolder Mask muPCB
Magetsi Insulation uye Short Circuit Prevention
Yese pcb yekugadzira maitiro inoda yakasimba magetsi ekudzivirira. Iyo solder mask layer inoshanda senge nhovo pakati pematanho emhangura. Nhoo iyi inomisa maseketi mapfupi, kunyanya kana maronda ari pedyo. Solder mask inochengetedza solder kubva pakugadzira mabhiriji asingadiwi. Inodzivirira mhangura kubva kune oxidation uye inochengetedza bhodhi rako rakachengeteka. Solder mask film inogona kubata 40-100 volts pa micron. Izvi zvinobatsira kuti dhizaini yako irambe yakavimbika.
Inodzivirira mitsetse yemhangura kumisa zvikabudura.
Inodzivirira mhangura kubva kune oxidation uye tsvina.
Inomisa mabhiriji ekutengesa panguva yegungano.
Kufambisa Yakakwana Soldering
Iwe unoda kuti soldering ive yakarurama kune zvikamu zviduku. Solder mask dhizaini inobatsira kudzora kwainoenda solder. Liquid Photoimageable solder mask inoita mazaruro chaiwo emapads. Solder mask inotsanangurwa pads chengetedza solder munzvimbo chaiyo. Iyo mask yekuvhura idiki pane pad, saka solder haina kupararira zvakanyanya. Kudzora uku kunodzikisa njodzi yemabhiriji ekutengesa uye kunobatsira kuburitsa goho.
Solder mask saizi inoenderana ne pad dhizaini yechokwadi.
Solder mask layer inochengeta solder panzvimbo dzakakodzera.
Kudzivirirwa Kunopesana Nezvakatipoteredza Zvinhu
Bhodhi rako rinotarisana nenjodzi dzakawanda kubva kune zvakatipoteredza. Solder mask layer inodzivirira kubva pakupisa, makemikari, uye UV mwenje. Heano kutyisidzira kwakajairika uye kuti solder mask inobatsira sei:
Environmental Factor | tsananguro |
|---|---|
Kushushikana Kwemhepo | Kupisa kwakanyanya kunogona kuchinja ruvara. |
Chemical Exposure | Kuchenesa vamiririri uye flux inogona kuita nemask. |
UV Exposure | Chiedza chezuva chinogona kushandura mask color. |
Manufacturing Issues | Kurapa kwakaipa kana tsvina kunogona kukuvadza mask. |
Kusapindirana kwezvinhu | Zvinhu zvisiri izvo zvinogona kukonzera matambudziko. |
Kuderedza Matanho | Shandisa UV-inodzivirira mask, kurongedza kwakanaka, uye conformal coating. |
Kuvandudza Chiratidzo Kutendeseka uye Bhodhi Hurefu Hwehupenyu
Unoda zviratidzo zvakagadzikana zvekugadzirwa kwepamusoro-frequency. Solder mask ukobvu inokanganisa chiratidzo chemhando uye impedance. Iyo yunifomu solder mask firimu inovhara crosstalk uye kupindira. Kana ukobvu huchichinja, unogona kuona kurasikirwa kwechiratidzo kana maratidziro. Iyo yakanaka solder mask layer inobatsira bhodhi rako kugara kwenguva refu uye kushanda zvirinani.
Solder mask layer inochengeta dielectric zvivakwa zvakatsiga.
Yakanaka solder mask kushandiswa inodzikisa kukanganiswa kwemagetsi.
Solder Mask Layer vs Imwe Layer muPCB
Iwe unogona kushamisika kuti solder mask inofananidzwa sei nemamwe maseru. Solder mask layer inochengetedza mhangura yemhangura kubva kune oxidation uye inochengeta solder munzvimbo. Mamwe maturu, senge silkscreen kana mhangura, haape dziviriro yakafanana. Solder mask inoita kuti pcb yekugadzira iwedzere kuoma, asi inodiwa pakuvimbika.
Inodzivirira mitsetse yemhangura kuti imise mapfupi maseketi.
Inodzivirira kubva pakukuvadzwa kubva kune zvakatipoteredza.
Inoita shuwa kuti solder inonamatira chete kunzvimbo dzakakodzera.
Iwe unoda solder mask kuchengetedza PCB yako yakachengeteka kubva mukukuvadza. Solder mask inomisa solder mabhiriji uye inodzivirira nzira dzemhangura. Inoderedzawo matambudziko kubva mumvura uye kupisa. Kuti uwane zvibereko zvakanakisisa, tevera mitemo yakarurama uye tora zvinhu zvakanaka. Shandisa nzira chaiyo yekuisa pane solder mask. Unogona kudzidza zvakawanda nekuverenga IPC-SM-840C. Tafura iri pazasi inonyora hudiki diki kune yega PCB kirasi:
kirasi | tsananguro | Minimum ukobvu |
|---|---|---|
1 | General Electronic Zvigadzirwa | Hapana zvishoma zvinodiwa |
2 | Dedicated Service Electronic Zvigadzirwa | 10μm |
3 | High-Kuvimbika Electronic Zvigadzirwa | 18μm |
Zano: Verenga mazano enyanzvi uye shandisa nhanho dzakanaka kubatsira PCB yako kushanda zvirinani.
FAQ
Chii chinoitika kana ukasashandisa solder mask paPCB yako?
Unoisa njodzi mapfupi maseketi uye solder mabhiriji. Maronda emhangura anogona kuita ngura kana kusvibiswa. Bhodhi rako rinogona kukundikana nekukurumidza. Solder mask inochengeta PCB yako yakachengeteka uye yakavimbika.
Unogona here kugadzirisa yakakuvadzwa solder mask?
Hongu, iwe unogona kugadzirisa nzvimbo diki nemapeni ekugadzirisa akakosha kana epoxy. Chenesa nzvimbo yacho kutanga. Isa zvinhu zvekugadzirisa uye uite kuti zviome. Izvi zvinobatsira kudzivirira mhangura zvakare.
Ko solder mask inokanganisa maitiro ePCB yako?
Ehe, solder mask inopa bhodhi rako ruvara uye kupera. Unogona kusarudza girinhi, tsvuku, bhuruu, dema, kana mamwe mavara. Iyo mask zvakare inoita kuti silkscreen zvinyorwa zvive nyore kuverenga.
Iyo solder mask yakachengeteka kune yakanyanya-tembiricha soldering?
Mazhinji masikisi emasoja anobata kupisa kwakanyanya panguva yekushambadzira. Iwe unofanirwa kutarisa iyo mask mhando uye yayo tembiricha chiyero. Masks akanaka ekutengesa anoramba kupisa kusvika ku260 ° C kwenguva pfupi.
