Enyanisweni, i-impedance control routine yi-10% yokutenxa. Umntu ongqongqo kancinci unokufikelela kwi-8%. Kukho izizathu ezininzi:

1. Ukutenxa kwemathiriyeli yephepha ngokwalo

2. Etching ukutenxa ngaphakathi PCB ukwenziwa

3. Ukutenxa okufana nesantya sokuqukuqela okubangelwa kukwalanywa ngexesha lokusetyenzwa kwePCB

4. Ngesantya esiphezulu, uburhabaxa bomphezulu wefoyile yethusi, i-glass fiber effect yePP, i-DF frequency change effect of the medium, njl.

Ukuqonda i-impedance, kufuneka uqonde ukusetyenzwa. Kumanqaku ambalwa alandelayo, makhe sijonge ulwazi oluthile lokucubungula. Owokuqala uya kujonga i-lamination:

1. Umgaqo wokucinezela PCB

Injongo ephambili ye-lamination kukudibanisa i-PP kunye neebhodi ezahlukeneyo zangaphakathi zangaphakathi kunye neefowuni zangaphandle zethusi ngokusebenzisa “ubushushu kunye noxinzelelo”, kwaye usebenzise i-foil yobhedu yangaphandle njengesiseko sesekethe yangaphandle. Kwaye ukubunjwa kwePP okwahlukileyo kunye nepleyiti yangaphakathi eyahlukeneyo kunye nobhedu olungaphezulu lunokuxhotyiswa ngeenkcazo ezahlukeneyo kunye nobukhulu beebhodi zeesekethe. Inkqubo yokucinezela yeyona nkqubo ibalulekileyo ekwenziweni kweebhodi ezininzi zePCB, kwaye kufuneka ihlangabezane nezikhombisi zomgangatho wePCB emva kokucinezela.

1. Ukutyeba: Ibonelela ngokufakelwa kombane okuhambelanayo, ulawulo lwe-impedance, kunye nokuzaliswa kweglue phakathi kweeleya zangaphakathi.

2. Ukudibanisa: Ukubonelela nge-bonding nge-black yangaphakathi (brown) kunye ne-foil yobhedu yangaphandle.

3. Ukuzinza kwe-Dimensional: Ukutshintshwa kwe-dimensional ye-dimensional layer yangaphakathi ihambelana nokuqinisekisa ukulungelelaniswa kwemingxuma kunye neendandatho zoluhlu ngalunye.

4. Ukulwa kwebhodi: Gcina ukuthambeka kwebhodi.

2. Inkqubo yokucofa iPCB

Iimeko ekufuneka kuhlangatyezwane nazo ukulungiselela inkqubo yokucinezela

A. Iimeko zezinto eziphathekayo:

Ibhodi engundoqo yangaphakathi yepateni yomqhubi yenziwe

Ifoyile yobhedu

Ukulungiselela

B. Iimeko zenkqubo:

ubushushu obuphezulu

uxinzelelo oluphezulu

3. Intshayelelo kwiPP yezinto ezilaminated

isimilo:

Iipropati ze-prepreg

A. RC% (Umxholo we-Resin): ibhekisela kwipesenti yobunzima becandelo le-resin kwifilimu ngaphandle kwelaphu leglasi. Isixa se-RC% sichaphazela ngokuthe ngqo ukukwazi kwe-resin ukuzalisa izikhewu phakathi kweengcingo, kwaye ngexesha elifanayo limisela ubukhulu boluhlu lwe-dielectric emva kokucinezela ibhodi.

B. RF% (Resin flow): ibhekisa kwipesenti yeresin equkuqelayo ngaphandle kwebhodi ukuya kubunzima bubonke beprepreg yokuqala emva kokucofa ibhodi. I-RF% sisalathiso esibonisa ubumanzi be-resin, kwaye ikwamisela ubukhulu bomaleko we-dielectric emva kokucofa ipleyiti.

C. VC% (umxholo oguquguqukayo): ubhekiselele kwipesenti yobunzima bokuqala bezinto eziguqukayo ezilahlekileyo emva kokuba i-prepreg yomile. Ubungakanani be-VC% buchaphazela ngokuthe ngqo umgangatho emva kokucinezela.

umsebenzi:

1. Njengendlela yokudibanisa yomaleko angaphakathi nangaphandle.

2. Ukubonelela ngobungakanani obufanelekileyo bomaleko wokugquma. Ifilimu yenziwe ngelaphu lefiber yeglasi kunye neresin. Umahluko wobunzima befilimu efanayo yelaphu leglasi yefayibha emva kokucinezela ilungiswa ikakhulu sisiqulatho seresin eyahlukileyo kuneemeko zokucinezela.

3. Ulawulo lwe-impedance. Phakathi kwezinto ezine eziphambili ezichaphazelayo, ixabiso likaDkt kunye nobukhulu boluhlu lwe-dielectric luchongwa ziimpawu zefilimu. Ixabiso likaDkt lefilimu eyenziweyo ingabalwa ngokufanelekileyo ngolu hlobo lulandelayo.

Dk=6.01-3.34RR: Umxholo we-resin%

Ngoko ke, ixabiso likaDkt elisetyenziswe xa kuqikelelwa i-impedance ingabalwa ngokusekelwe kumlinganiselo wengubo yeglasi yefiber kunye ne-resin kwinhlanganisela yefilimu ye-laminated.

Ubukhulu bokwenene bePP emva kokuzaliswa bubalwa ngolu hlobo lulandelayo:

Ukutyeba emva kocinezelo lwePP

1. Ukutyeba = ubukhulu bethiyori yelahleko yokuzaliswa kwePP eyodwa

2. Ukuzalisa ilahleko = (1-A umphezulu umaleko wangaphakathi ifoyile yobhedu ireyithi yobhedu eseleyo) x umaleko wangaphakathi wefoyile yobhedu ubukhulu + (1-B umphezulu wangaphakathi umaleko wefoyile yobhedu eshiyekileyo) x ubungqingqwa bangaphakathi befoyile yobhedu/3, umaleko wangaphakathi Oshiyekileyo izinga lobhedu = indawo yocingo yangaphakathi / indawo yebhodi yonke

Iireyithi zobhedu ezishiyekileyo zemaleko amabini angaphakathi kulo mzobo ungasentla zimi ngolu hlobo lulandelayo:

Nceda uqaphele le fomula ingentla. Ukuba sibala ilahleko yokuzaliswa komgangatho wangaphandle wesibini, kufuneka sibale kuphela icala elinye, kungekhona umlinganiselo wobhedu oseleyo woluhlu lwangaphandle. ngoku Landelayo:

Ukuzalisa ilahleko = (1-yangaphakathi ifoyile yobhedu yereyithi yentsalela yobhedu) x ubukhulu befoyile yobhedu yangaphakathi

Uyilo lwesakhiwo soxinzelelo

1

(2) I-PP enexabiso eliphantsi ikhethwa (kwilaphu yeglasi efanayo yodidi lwePP, umxholo we-resin awuchaphazeli ixabiso)

(3) Ubume be-symmetrical bukhethwa ukuphepha i-warpage ye-PCB emva kwemveliso egqityiweyo. Lo mzobo ulandelayo uyisakhiwo esingenamlinganiselo kwaye awukhuthazwa.

(4) Ubukhulu bomaleko we-dielectric》ubukhulu befoyile yobhedu yangaphakathi×2

(5) Akuvumelekanga ukusebenzisa i-PP enomxholo ophantsi we-resin kwiphepha elilodwa phakathi kwe-1-2 imigangatho kunye ne-n-1 / n i-leya, njenge-7628 × 1 (n linani leengqimba)

(6) Kwi-3 okanye ngaphezulu prepregs zilungelelaniswe kunye okanye ubukhulu bomaleko we-dielectric bukhulu kune-25 mils, ngaphandle komgangatho ongaphandle kunye nongaphakathi wePP, umbindi wePP uthatyathelwa indawo yibhodi yokukhanya.

(7) Xa umaleko wesibini kunye no-n-1 umaleko yi-2oz yobhedu ezantsi kunye nobukhulu be-1-2 kunye ne-n-1 / n umaleko we-insulating layer ingaphantsi kwe-14mil, akuvumelekanga ukusebenzisa i-PP enye, kunye neyona ingaphandle. umaleko ufuna ukusebenzisa umxholo we-resin ephezulu PP. Njenge 2116, 1080; ukuba ireyithi yobhedu eshiyekileyo ingaphantsi kwama-80%, zama ukuphepha ukusebenzisa i-1080PP enye

(8) Uluhlu lwangaphakathi lwebhodi ye-1oz yobhedu, xa i-1-2 layer kunye ne-n-1 / n layer isebenzisa i-1 PP, i-PP idinga ukusebenzisa umxholo ophezulu we-resin, ngaphandle kwe-7628 × 1

(9) Akuvumelekanga ukusebenzisa iPP eyodwa kwiibhodi ezinobhedu lwangaphakathi ≥ 3oz. Ngokubanzi, i-7628 ayisetyenziswa. IiPP ezininzi ezinomxholo ophezulu we-resin kufuneka zisetyenziswe, ezifana ne-106, 1080, 2116…

(10) Kwiibhodi ezininzi ezineendawo zobhedu ezingaphezulu kwe-3 “× 3″ okanye 1″ × 5”, iPP ayisetyenziswa ngokubanzi njengephepha elilodwa phakathi kweebhodi eziphambili.