Ceramic PCB Via uye Metallization: Technical Guide

Nhanganyaya: Via Zvimiro muCeramic PCBs

Zvivakwa zviri mumaPCB eceramic zvinopa mabasa maviri akakosha: kugadzira kubatana kwemagetsi pakati pezvikamu zvecircuit uye kupa nzira dzinoshanda dzekupisa kubva kuzvinhu zvinogadzira kupisa kusvika kumasinki ekupisa. Kusiyana nemabhodhi echinyakare eFR-4, masimbi eceramic anoumbwa nealumina (Al₂O₃), aluminium nitride (AlN), kana silicon nitride (Si₃N₄) zvinhu zvisingafambise magetsi.

Hunhu uhwu hunoreva kuti via ne metallization muma ceramic PCBs zvinofanirwa kuvimba zvizere nehunyanzvi hwekuisa simbi uye maitiro ekuzadza kuti pave nekubatana kwakavimbika pakati pezvikamu. Hunhu hwezvivakwa izvi zvakagadzirwa nesimbi hunosarudza zvakananga mashandiro emagetsi uye kugona kwekutonga kupisa kwechikamu chapera.

Ceramic PCB Via Types uye Configurations

Kunzwisisa zvakasiyana-siyana zveceramic PCB kuburikidza nekugadzirisa kunoita kuti vagadziri vagone kukwidziridza kuita kwedunhu kune chaiwo maapplication. Imwe neimwe kuburikidza nemhando inopa mabhenefiti akasiyana maererano nechiratidzo chekufambisa kuchinjika, mashandiro ekupisa, uye kuoma kwekugadzira.

Kuburikidza neHole Vias

Maburi anobuda nepakati anopinda muukobvu hwese hwepasi pevhu, zvichigadzira nzira inoenderera mberi yekufambisa magetsi kubva kumusoro kusvika pasi. Zvivakwa izvi zvinopa kugona kwakanaka kwekutakura magetsi emagetsi ekutumira masaini uye kupisa. Nzvimbo yakakura kwazvo yekuisa magetsi nepakati inopa simba shoma remagetsi uye kupisa kwakanyanya kana tichienzanisa nepadiki kuburikidza nejometri.

Mapofu uye Akavigwa Vias

Blind vias anotambanudzira kubva okunze rukoko kupinda mukati akaturikidzana pasina kupinda yose substrate, nepo akavigwa vias aripo zvachose mukati mukati akaturikidzana. Aya epamberi ceramic PCB kuburikidza nezvimiro anogonesa yakakwirira yedunhu density nekusunungura kumusoro kwenzvimbo. Mabhenefiti akakosha anosanganisira:

• Space optimization -Nzvimbo yepamusoro inoramba iripo yekuwedzera chikamu chekuiswa uye nzira.
• Chiratidzo chekuvimbika - Yakaderedzwa stub mhedzisiro inoderedza kukanganiswa kwemagetsi pakati pematanho edunhu.
• High-density kugona -Yakakosha kune RF modules, sensor arrays, uye miniaturized magungano.

Kugadzira kuomarara kunowedzera nezvimiro izvi, zvinoda kurongeka kwakanyatso kurongeka panguva yekugadzira.

Yakazadzwa Vias

PCB yeceramic yakazadzwa kuburikidza nehurongwa hwayo inosanganisira zvinhu zvinofambisa mhepo zvakaita semhangura, sirivha, tungsten, kana molybdenum mukati mebharero. Izvi zvinobvisa pakati pema-plated-only vias, zvichivandudza zvakanyanya thermal conductivity uye structure integrity. Mashandisirwo anoda kupisa kwakanyanya, akadai se LED modules uye power electronics, anowanzo tsanangura ma-thermal vias akazadzwa kuti agadzire nzira dzinoshanda dzekufambisa kupisa kuburikidza ne substrate.

Metallization Techniques yeCeramic PCB Vias

Iyo metallization process inosarudza iyo adhesion simba, magetsi conductivity, uye kwenguva refu kuvimbika kweceramic PCB kuburikidza nezvimiro. Maitiro akasiyana anokodzera akasiyana substrate zvinhu uye zvinodiwa zvekushandisa.

Yakakora-Firimu Metallization

Kugadzira simbi yakakora kunosanganisira mapeta anodhinda nekudhinda ane zvidimbu zvesimbi pamusoro peceramic, zvichiteverwa nekupiswa kwesimbi zvakanyanya. Mapeta esirivha netungsten ndiwo anonyanya kushandiswa, sirivha ichipa conductivity yakanaka uye tungsten ichipa kunamira kwakanaka kune substrates dzealumina. Iyi nzira inogadzira zvidimbu zveconductor zvinowanzova nehukobvu hwema micrometer gumi kusvika makumi maviri nemashanu.

Maitiro acho anogarisa ceramic PCB kuburikidza nekuzadza nekudhinda paste mumakomba akaumbwa asati aita sintering. Feature resolution inoganhura nzira iyi kumaseketi ane upamhi hwemutsara pamusoro pe100 micrometer.

Mutete-Firimu Metallization

Maitiro ekugadzira firimu rakatetepa anoshandisa nzira dzekubvisa vacuum dzakadai sekuputira kana kupwanya mvura kuti vagadzire simbi dzakatetepa dziri pasi peukobvu hwema micrometer mashanu. Nzira idzi dzinogonesa tambo dzakatetepa dzine zvinhu zvinosvika kuma micrometer makumi maviri, zvakanakira kushandiswa kwema high-frequency uye substrates diki.

Iyo yakatetepa-firimu maitiro kune ceramic PCB kuburikidza nekuumbwa kazhinji inosanganisa sputter deposition yekugadzira mhodzi layer, photolithographic patterning, uye electroplating yehukobvu kuvaka. Izvi zvinowana yakanakisa dimensional kudzora kune yakaoma multilayer zvimiro.

Yakananga Copper Bonding uye Active Metal Brazing

Yakananga copper bonding (DCB) inogadzira chisungo chesimbi pakati pemhangura foil uye ceramic substrates kuburikidza nepamusoro-tembiricha oxidation, ichigadzira yakasarudzika adhesion simba. Maitirwo acho anogadzira mhangura akaturikidzana anowanzo 0.3 kusvika 0.8 millimita mukobvu anobata mitoro yakakwira ikozvino. Active metal brazing (AMB) inoshandisa simbi dzinoshanda dzakaita setitanium kusimudzira kemikari kubatana pakati pemhangura neceramic nzvimbo.

Aya matekiniki anopa simbi yakasimba yemamodule emagetsi asi inoda kungwarira kutonga kwemafuta nekuda kweiyo coefficient yekuwedzera kwekupisa kusawirirana. Kubatanidzwa neceramic PCB kuburikidza nezvimiro zvinowanzoitika kuburikidza kunotevera kuchera uye electroplating.

Electroplating yeVia Metallization

Electroless plating inoteverwa neelectrolytic plating inomiririra nzira yakajairwa yekuisa simbi kuburikidza nemadziro muceramic substrates. Iyo electroless deposition inogadzira yakatetepa conductive mhodzi kuburikidza nekudzikisa kemikari, ichigonesa inotevera electrolytic kuvaka kune inodiwa ukobvu hwemhangura. Iyi ceramic PCB kuburikidza nemetalization sequence inowana kufukidzwa kwakafanana kunyangwe mumakomba akakwira-aspect-ratio.

Iyo nzira inoda kunyatsogadzirira kwepamusoro kunosanganisira kuchenesa uye activation matanho kuti uve nechokwadi chekunamatira kwakakodzera. Plating chemistry inofanirwa kugadzirwa kune chaiyo ceramic zvinhu kudzivirira voids kana delamination.

Via Kuzadza uye Ceramic PCB Kuvimbika

Kuvimbika kwenguva refu kweceramic PCB kuburikidza nezvimiro kunoenderana zvakanyanya nekuzadza zvinhu, maitiro ekugadzirisa, uye dhizaini dhizaini yekugadzirisa kushushikana pakati pezvinhu zvakasiyana.

Kuzadza Zvishandiso uye Nzira

Kusarudzwa kwezvinhu zveceramic PCB kuburikidza nekuzadza zviyero zvemagetsi kuita, kupisa conductivity, uye coefficient yemafuta ekuwedzera anoenderana:

• Kuzadza mhangura -Yakanyanya magetsi uye yekupisa conductivity asi inoda kudzivirira oxidation panguva yekushanda kwepamusoro-tembiricha.
• Silver paste -Kuenderana kwakanaka neakakora-firimu kugadzirisa kune zvine mwero zvinopisa zvinodikanwa.
• Tungsten uye molybdenum - Thermal yekuwedzera coefficients padyo neceramics inoderedza kushushikana asi gamuchira yakaderera conductivity.

Vacuum-inobatsira sintering uye sequential electroplating inomiririra nzira dzakavimbika dzekugadzira isina-isina zvimiro zvinochengetedza kuvimbika kuburikidza nekupisa bhasikoro.

Thermal Kuwedzera Mismatch

Iyo coefficient yemafuta ekuwedzera mutsauko pakati peceramic substrates uye simbi kuburikidza nekuzadza inogadzira mechaniki kushushikana panguva yekupisa tembiricha. Alumina inoratidza kuwedzera kwekupisa kwakatenderedza 7 ppm/°C, ukuwo mhangura ichiwedzera panosvika 17 ppm/°C, ichigadzira kushushikana kukuru paceramic-metal interfaces.

Mazano ekuderedza anosanganisira kusarudza zvinhu zvekuzadza zvine coefficients padyo ne substrate, kudzora kuburikidza nejometry kuderedza kushushikana, uye kubatanidza kushushikana-kuzorodza maficha mumetallization dhizaini. Kuyedza maprotocol anofanirwa kusanganisira kupisa bhasikoro pakati petembiricha yakanyanyisa inomiririra nzvimbo yakanangwa yekushandisa.

Kuvimbika Kuedzwa uye Kukundikana Modes

Yakakwana kuvimbika ongororo yeceramic PCB kuburikidza nezvimiro zvinosanganisa kuyedzwa kwemagetsi, kupisa bhasikoro, mechanical stress test, uye isinga paradza ongororo. Mamiriro ekukundikana anosanganisira:

• Magetsi anovhura -Kupaza kuparadzira kuburikidza nedhiramu kunokanganisa kuyerera kwazvino.
• Kuwedzera kushorwa -Kuumbwa kusina maturo kana kutama kwesimbi kunoderedza kushanda kwemagetsi.
• Kubatana kwepakati -Kuneta kwemafuta pakusangana kwezvinhu kunokonzeresa nyaya dzekuvimbika.

Muchinjikwa-chikamu microscope inoratidza hurema hwemukati nepo X-ray yekufungidzira ichigonesa isiri-inoparadza yekuongorora kuburikidza nekuzadza mhando. Kugadziriswa kwedhizaini kunofanirwa kusanganisira tembiricha yekuchovha bhasikoro kubva -55°C kusvika +150°C kana kukwira zvichienderana nezvinodiwa neapplication.

Dhizaini uye Maitiro Ekugadzirisa eCeramic PCB Vias

Strategic dhizaini sarudzo uye yekugadzira maitiro ekunatsiridza anowedzera ceramic PCB kuburikidza nekuita uku uchichengetedza mutengo-kushanda uye kugadzira.

Via Distribution uye Thermal Path Dhizaini

Kugonesa kuburikidza nekuiswa zvine chekuita nezvinopisa zvinogadzira zvinogadzira nzira dzekupisa dzinodzikisira tembiricha dzekusangana. Zvikamu zvine simba repamusoro-soro zvinobatsirika kubva kune arrays emazivhasi anopisa akaiswa zvakananga pasi pechitsiko chemudziyo kuparadzira kupisa munzvimbo hombe dzemhangura kana kunze kwekupisa kwemvura.

Via pitch uye dhayamita inofanira kuenzanisa mashandiro ekupisa zvichipesana nekuvimbika kwemuchina, ine mareshiyo anowanzo chengetwa pazasi 10: 1 kune akajairwa ekuputira maitiro. Dense kuburikidza nearrays pasi pesimba semiconductors zvakanyanya kuderedza kupisa kwekudzivirira.

Kufunga Kwekugadzira

Maitiro ekugona miganhu anoisa zvipingamupinyi zvinoshanda pane ceramic PCB kuburikidza nedhizaini paramita. Zvidiki kuburikidza nemadhayamita zvinowanzobva pa 0.15 kusvika 0.30 millimeters zvichienderana nekukora kwe substrate uye nzira yekuchera, nelaser drilling inogonesa zvidiki pane kuchera kwemuchina.

Metallization ukobvu zvinodiwa zvinoenderana neazvino-yekutakura huwandu uye inofanirwa kuverengera yakaderedzwa yeplating ukobvu pamatunhu kana ichienzaniswa nematunhu ekupinda. Vagadziri vanofanirwa kumisa maitiro ekudzora maitiro anosanganisira kuburikidza nekuyerwa kuyerwa, metallization cross-section analysis, uye thermal impedance test.

Kudyidzana neAnokwanisa Ceramic PCB Mugadziri

Kuwana yakavimbika ceramic PCB kuburikidza nezvimiro kunoda hunyanzvi hwekushandisa, hunyanzvi hwekuita, uye masisitimu ekudzora emhando anongove nevagadziri vane ruzivo. Iko kupindirana kwakaoma pakati pe substrate zvinhu zvivakwa, metallization chemistry, uye kupisa kwemafuta kunoda zvakadzama ruzivo rwehunyanzvi rwakaunganidzwa kuburikidza neruzivo rwekugadzira.

Zvivakwa zvekugadzira zvinofanirwa kuchengetedza kugona kwekuchera kana laser ablation, akawanda metallization maitiro anosanganisira gobvu-firimu uye yakaonda-firimu maitiro, inodzorwa mhepo sintering, uye electroplating ine chaiyo ukobvu kutonga.

Highleap Electronics inounza hunyanzvi hwakakwana hwekugadzira ceramic substrate kusanganisira nzira dzepamusoro-soro dzekugadzira, simbi, uye kuzadza dzakagadzirwa kuburikidza nebasa rakakura nealumina, aluminium nitride, uye silicon nitride materials. Chikwata chedu cheinjiniya chinopa dhizaini yekuongorora kugona kwekugadzira kuti igadzirise kuburikidza nemagadzirirwo ekushanda uye goho rekugadzira. Tinokukoka kuti utumire mafaira ako ekugadzira kuti uongorore zvizere kugona kwekugadzira uye kurudziro yemaitiro akagadzirirwa zvinodiwa zvako zvekushandisa.