Pofika nthawi ya chidziwitso cha digito, zofunikira za kulankhulana kwafupipafupi, kutumizirana mwachangu, komanso chinsinsi cha mauthenga akuchulukirachulukira.Monga chinthu chofunikira kwambiri pamakampani opanga zidziwitso zamagetsi, PCB imafuna gawo lapansi kuti likwaniritse magwiridwe antchito a dielectric otsika, otsika media, kukana kutentha kwambiri, etc. magawo, omwe amagwiritsidwa ntchito kwambiri ndi zida za Teflon (PTFE).Komabe, mu ndondomeko PCB processing, chifukwa osauka padziko nyongolotsi ntchito Teflon chuma, pamwamba kunyowetsa ndi plasma mankhwala chofunika pamaso pa dzenje metallization, kuonetsetsa patsogolo bwino za dzenje metalization ndondomeko.

Kodi Plasma ndi chiyani?

Plasma ndi mtundu wa zinthu womwe umapangidwa makamaka ndi ma electron aulere ndi ma ion omwe amaperekedwa, omwe amapezeka kwambiri m'chilengedwe chonse, omwe nthawi zambiri amawoneka ngati gawo lachinayi lazinthu, lomwe limadziwika kuti plasma, kapena "Ultra gaseous state", yomwe imadziwikanso kuti "plasma".Plasma imakhala ndi ma conductivity apamwamba ndipo imaphatikizidwa kwambiri ndi minda yamagetsi.

Njira

Kugwiritsa ntchito mphamvu (mwachitsanzo mphamvu yamagetsi) mu molekyulu ya gasi mu chipinda chopumulirako kumachitika chifukwa cha kugundana kwa ma elekitironi othamanga kwambiri, kumayaka ma elekitironi akunja kwa mamolekyu ndi ma atomu, ndi ma ayoni otulutsa, kapena ma radicals aulere kwambiri.Chifukwa chake ma ion, ma free radicals amawombana mosalekeza ndikuthamangitsidwa ndi mphamvu yakumunda yamagetsi, kotero kuti imagundana ndi zinthuzo, ndikuwononga zomangira zama cell mkati mwa ma microns angapo, zimapangitsa kuchepa kwa makulidwe ena, kumapanga bumpy. pamwamba, ndipo nthawi yomweyo amapanga kusintha kwa thupi ndi mankhwala padziko lapansi monga gulu la ntchito la mpweya, kumapangitsanso mphamvu zomangira zamkuwa, zowonongeka ndi zina.

Oxygen, nitrogen, ndi mpweya wa Teflon amagwiritsidwa ntchito kwambiri m'madzi a m'magazi omwe ali pamwambawa.

Kusintha kwa plasma komwe kumagwiritsidwa ntchito m'munda wa PCB

• dzenje khoma dent pambuyo pobowola, kuchotsa dzenje khoma pobowola dothi;
• Chotsani carbide pambuyo pobowola mabowo akhungu laser;
• Pamene mizere yabwino imapangidwa, zotsalira za filimu yowuma zimachotsedwa;
• Pamwamba pa khoma la dzenje limatsegulidwa zinthu za Teflon zisanakhazikitsidwe mkuwa;
• Pamwamba kutsegula pamaso mkati mbale lamination;
• Kuyeretsa golide asanamira;
• Pamwamba kutsegula pamaso kuyanika ndi kuwotcherera filimu.
• Kusintha mkati padziko mawonekedwe ndi wetting, kusintha interlayer kumanga mphamvu;
• Chotsani corrosion inhibitors ndi zotsalira za filimu zowotcherera;

Tchati chosiyana cha zotsatira pambuyo pokonza

1. Kuyesa kwa Hydrophilic Development

2. SEM yokhala ndi mkuwa m'mabowo a pepala la RF-35 isanayambe komanso itatha mankhwala a plasma

3. Kuyika kwa mkuwa pamwamba pa bolodi la PTFE Base isanayambe komanso itatha kusintha kwa plasma

4. The Solder chigoba chikhalidwe cha pamwamba pa bolodi PTFE maziko pamaso ndi pambuyo plasma kusinthidwa

Kufotokozera za zochita za plasma

1, Adamulowetsa mankhwala Teflon zakuthupi

Koma akatswiri onse amene akhala akuchita metallization polytetrafluoroethylene chuma mabowo ndi zinachitikira izi: ntchito wamba. FR-4 Mipikisano wosanjikiza kusindikizidwa dera bolodi dzenje metalization processing njira, si bwino PTFE dzenje metalization.Pakati pawo, chithandizo choyambirira cha PTFE chisanachitike kuyika kwa mkuwa wamankhwala ndizovuta kwambiri komanso gawo lofunikira.Mu kutsegula mankhwala a PTFE zinthu pamaso mankhwala mkuwa mafunsidwe, njira zambiri angagwiritsidwe ntchito, koma lonse, akhoza zimatsimikizira khalidwe la mankhwala, oyenera zolinga misa kupanga ndi awa awiri:

a) Chemical processing njira: zitsulo sodium ndi radon, anachita mu zosungunulira sanali madzi monga tetrahydrofuran kapena glycol dimethyl etha njira, mapangidwe nio-sodium zovuta, ndi sodium mankhwala njira, akhoza kupanga maatomu padziko Teflon mu dzenje ndi impregnated, kukwaniritsa cholinga wetting dzenje khoma.Iyi ndi njira yodziwika bwino, zotsatira zabwino, khalidwe lokhazikika, limagwiritsidwa ntchito kwambiri.

b) Njira yochizira plasma: njirayi ndi yosavuta kugwiritsa ntchito, yokhazikika komanso yodalirika yopangira, yoyenera kupanga misa, kugwiritsa ntchito njira yowumitsa ya plasma.Njira yothetsera sodium-crucible yokonzedwa ndi njira yopangira mankhwala ndizovuta kupanga, poizoni wambiri, moyo wa alumali waufupi, uyenera kupangidwa molingana ndi momwe zinthu ziliri, zofunikira zachitetezo.Choncho, pakali pano, ndi kutsegula mankhwala a PTFE pamwamba, njira mankhwala plasma kwambiri, zosavuta ntchito, ndi kuchepetsa kwambiri mankhwala a madzi oipa.

2, dzenje khoma cavitation / dzenje khoma utomoni pobowola kuchotsa

Pakuti FR-4 Mipikisano wosanjikiza kusindikizidwa wozungulira bolodi processing, CNC pobowola pambuyo dzenje khoma utomoni kubowola ndi kuchotsa zinthu zina, kawirikawiri ntchito anaikira sulfuric acid mankhwala, chromic asidi mankhwala, mankhwala amchere potaziyamu permanganate, ndi madzi a m`magazi mankhwala.Komabe, mu kusintha kusindikizidwa dera bolodi ndi okhwima-osinthika kusindikizidwa dera bolodi kuchotsa kubowola dothi mankhwala, chifukwa cha kusiyana kwa zinthu makhalidwe, ngati ntchito pamwamba mankhwala njira mankhwala, zotsatira zake si abwino, ndi ntchito plasma. kubowola dothi ndi concave kuchotsa, mukhoza kupeza bwino dzenje khoma roughness, yabwino kwa zitsulo plating dzenje, komanso ali "atatu azithunzithunzi" concave kugwirizana makhalidwe.

3, Kuchotsedwa kwa carbide

Plasma mankhwala njira, osati zosiyanasiyana pepala pobowola pobowola mankhwala zotsatira zoonekeratu, komanso gulu utomoni zipangizo ndi micropores pobowola kuipitsa mankhwala, komanso kusonyeza kupambana kwake.Kuphatikiza apo, chifukwa chakuchulukirachulukira kopanga kwa matabwa ozungulira osanjikiza osanjikiza omwe ali ndi kachulukidwe kambiri, mabowo ambiri amabowola amapangidwa pogwiritsa ntchito ukadaulo wa laser, womwe umachokera ku laser pobowola mabowo akhungu - mpweya, womwe umayenera kuchotsedwa pamaso pa dzenje metallization ndondomeko.Panthawi imeneyi, plasma mankhwala luso, mosazengereza kutenga udindo kuchotsa mpweya.

4, Internal pre-processing

Chifukwa chakuchulukirachulukira kwamagulu osiyanasiyana osindikizira ozungulira, zofunikira zofananira ndiukadaulo ndizokwera kwambiri.The pretreatment mkati wa bolodi kusinthasintha kusindikizidwa dera ndi okhwima kusinthasintha kusindikizidwa dera bolodi akhoza kuonjezera roughness pamwamba ndi kutsegula digiri, kuonjezera kumanga mphamvu pakati wosanjikiza wamkati, komanso kukhala ndi tanthauzo lalikulu kusintha zokolola za kupanga.

Ubwino ndi kuipa kwa plasma processing

Kukonzekera kwa plasma ndi njira yabwino, yothandiza komanso yapamwamba kwambiri yochotsera zinyalala ndikuyika kumbuyo kwa matabwa osindikizidwa.Chithandizo cha plasma ndichoyenera makamaka kwa zida za Teflon (PTFE) chifukwa sizigwira ntchito kwambiri ndi mankhwala ndipo chithandizo cha plasma chimayambitsa ntchito.Kupyolera mu jenereta yapamwamba kwambiri (yomwe imakhala 40KHZ), teknoloji ya plasma imakhazikitsidwa pogwiritsa ntchito mphamvu ya magetsi kuti alekanitse mpweya wopangira mpweya pansi pa vacuum.Izi zimalimbikitsa mipweya yolekanitsa yosakhazikika yomwe imasintha ndikuphulitsa pamwamba.Njira zochizira monga kuyeretsa bwino kwa UV, kuyambitsa, kugwiritsa ntchito ndi kuphatikizira, ndi plasma polymerization ndi gawo la mankhwala a plasma.Plasma processing ndondomeko ndi pamaso pobowola mkuwa, makamaka mankhwala a mabowo, ambiri plasma processing ndondomeko ndi: kubowola - plasma mankhwala - mkuwa.Chithandizo cha plasma chimatha kuthana ndi zovuta za dzenje, zotsalira, kusanjikiza bwino kwamagetsi mkati mwa mkuwa wosanjikiza komanso dzimbiri zosakwanira.Makamaka, chithandizo cha plasma chimatha kuchotsa bwino zotsalira za utomoni pakubowola, komwe kumadziwikanso kuti kubowola kuipitsidwa.Zimalepheretsa kugwirizana kwa dzenje mkuwa ndi wosanjikiza wamkati wamkuwa panthawi yazitsulo.Kuti muwonjezere mphamvu yomangirira pakati pa plating ndi resin, fiberglass ndi mkuwa, ma slagswa ayenera kuchotsedwa oyera.Choncho, plasma degluing ndi dzimbiri mankhwala amaonetsetsa kugwirizana magetsi pambuyo deposition mkuwa.

Makina a plasma nthawi zambiri amakhala ndi zipinda zosinthira zomwe zimasungidwa m'chipinda chopanda kanthu ndipo zimakhala pakati pa mbale ziwiri za electrode, zomwe zimalumikizidwa ndi jenereta ya RF kuti apange ma plasma ambiri m'chipinda chopangiramo.M'chipinda chopangira zinthu pakati pa mbale ziwiri za electrode, malo omwe ali ndi ma equidistant ali ndi mipata ingapo yolowera makadi kuti apange malo ogona magalamu angapo omwe amatha kukhala ndi ma board a plasma processing circuit.Mu ndondomeko yomwe ilipo ya plasma ya bolodi la PCB, pamene gawo lapansi la PCB liyikidwa mu makina a plasma kuti akonzenso madzi a plasma, gawo la PCB nthawi zambiri limayikidwa mofanana pakati pa kagawo ka khadi ka chipinda chopangira plasma (ie, chipinda chokhala ndi plasma processing). dera bolodi), plasma ntchito plasma kuti plasma mankhwala dzenje pa gawo lapansi PCB kusintha chinyezi padziko dzenje.

Plasma makina processing patsekeke danga ndi laling'ono, Choncho, ambiri pakati pa awiri elekitirodi mbale processing chipinda wakhazikitsidwa ndi mawiri awiri osiyana khadi mbale grooves, ndiko kuti, mapangidwe midadada anayi akhoza kulola plasma processing dera bolodi danga pogona.Nthawi zambiri, kukula kwa gululi aliyense wa malo pogona ndi 900mm (utali) x 600mm (kutalika) x 10mm (lonse, mwachitsanzo makulidwe a bolodi), malinga ndi alipo PCB bolodi plasma processing ndondomeko, nthawi iliyonse The plasma processing bolodi. ali ndi mphamvu pafupifupi 2 lathyathyathya (900mm × 600mm × 4), pamene aliyense plasma processing mkombero nthawi ndi maola 1.5, motero kupereka mphamvu tsiku limodzi pafupifupi 35 masikweya mita.Zitha kuwoneka kuti mphamvu yopangira plasma ya bolodi ya PCB siikwera kwambiri pogwiritsa ntchito njira yopangira plasma ya bolodi ya PCB yomwe ilipo.

Chidule

Chithandizo cha plasma chimagwiritsidwa ntchito kwambiri m'mbale yothamanga kwambiri, HDI , kuphatikiza kolimba ndi kofewa, makamaka koyenera kwa zipangizo za Teflon (PTFE).Low kupanga mphamvu, mtengo wapamwamba ndi kuipa kwake, koma plasma mankhwala ubwino ndi zoonekeratu, poyerekeza ndi njira zina pamwamba mankhwala, izo pa matenda Teflon kutsegula, kusintha hydrophilicity ake, kuonetsetsa kuti metallization mabowo, laser dzenje mankhwala, kuchotsedwa kwa mzere wotsalira wotsalira filimu yowuma, roughing, pre-reinforcement, kuwotcherera ndi silkscreen character pretreatment, ubwino wake sungalowe m'malo, komanso kukhala ndi makhalidwe oyera, okonda chilengedwe.