Eqinisweni, inqubo yokulawula i-impedance ingu-10% ukuchezuka. Umuntu oqinile kancane angafinyelela ku-8%. Kunezizathu eziningi:

1. Ukuchezuka kwempahla yeshidi ngokwayo

2. Ukufaka ukuchezuka phakathi PCB processing

3. Ukuchezuka okufana nezinga lokugeleza okubangelwa ukufakwa kwe-lamination phakathi nokucubungula kwe-PCB

4. Ngesivinini esikhulu, ukugoqa kobuso be-foil yethusi, umphumela we-glass fiber we-PP, umphumela wokushintsha imvamisa ye-DF we-medium, njll.

Ukuze uqonde i-impedance, kufanele uqonde ukucubungula. Ezihlokweni ezimbalwa ezilandelayo, ake sibheke ulwazi oluthile lokucubungula. Owokuqala uzobheka i-lamination:

1. Isimiso PCB ngokucindezela

Inhloso eyinhloko ye-lamination ukuhlanganisa i-PP namabhodi angaphakathi ahlukene angaphakathi kanye ne-foil yethusi yangaphandle ngokusebenzisa “ukushisa nokucindezela”, futhi usebenzise i-foil yethusi yangaphandle njengesisekelo sesifunda sangaphandle. Futhi ukwakheka okuhlukile kwe-PP okunepuleti elingaphakathi elihlukile kanye nethusi elingaphezulu kungahlonyiswa ngokucaciswa okuhlukile nokuqina kwamabhodi wesekethe. Inqubo yokucindezela iwuhlelo olubaluleke kakhulu ekwakhiweni kwamabhodi ezendlalelo eziningi ze-PCB, futhi kufanele ihlangabezane nezinkomba zekhwalithi eziyisisekelo ze-PCB ngemva kokucindezela.

1. Ubukhulu: Ihlinzeka ngokufakwa kukagesi okuhlobene, isilawuli se-impedance, kanye nokugcwaliswa kweglue phakathi kwezingqimba zangaphakathi.

2. Inhlanganisela: Nikeza ukubopha nge-foil yethusi yangaphakathi emnyama (ensundu) nengaphandle.

3. Ukuzinza kwe-Dimensional: Ushintsho lwe-dimensional lwesendlalelo ngasinye sangaphakathi luyahambisana ukuze kuqinisekiswe ukuqondana kwezimbobo namaringi wesendlalelo ngasinye.

4. Ukungqubuzana kwebhodi: Gcina ukucaba kwebhodi.

2. Inqubo yokucindezela ye-PCB

Izimo okufanele zihlangatshezwe ngenqubo yokucindezela

A. Izimo zezinto ezibonakalayo:

Ibhodi elingaphakathi elingaphakathi lephethini yomqhubi wenziwa

Ucwecwe lwethusi

Ukulungiselela

B. Izimo zenqubo:

ukushisa okuphezulu

umfutho ophakeme

3. Isingeniso ku-PP yezinto ezifakwe laminated

isimilo:

Izakhiwo ze-prepreg

I-A. RC% (Okuqukethwe kwe-resin): ibhekisela kumaphesenti esisindo sengxenye ye-resin kufilimu ngaphandle kwendwangu yengilazi. Inani le-RC% lithinta ngokuqondile ikhono le-resin lokugcwalisa izikhala phakathi kwezintambo, futhi ngesikhathi esifanayo linquma ubukhulu bongqimba lwe-dielectric ngemva kokucindezela ibhodi.

B. RF% (Ukugeleza kwe-resin): ibhekisela kumaphesenti e-resin egeleza iphuma ebhodini kuya esilinganisweni sesisindo se-prepreg yasekuqaleni ngemva kokucindezela ibhodi. I-RF% iyinkomba ekhombisa ubumanzi be-resin, futhi inquma ukushuba kongqimba lwe-dielectric ngemuva kokucindezela ipuleti.

I-C. VC% (okuqukethwe okuguquguqukayo): ibhekisela kumaphesenti esisindo sangempela sezingxenye eziguqukayo ezilahleke ngemva kokuba i-prepreg yomile. Inani le-VC% lithinta ngqo ikhwalithi ngemuva kokucindezela.

umsebenzi:

1. Njengendlela yokuhlanganisa yezendlalelo zangaphakathi nezingaphandle.

2. Nikeza ugqinsi olufanele longqimba oluvikelayo. Ifilimu yakhiwe ngendwangu yengilazi ye-fiber ne-resin. Umehluko owugqinsi wefilimu yendwangu yengilazi yefayibha efanayo ngemva kokucindezela ulungiswa ngokuyinhloko okuqukethwe kwe-resin ehlukene kunezimo zokucindezela.

3. Ukulawulwa kokuphazamiseka. Phakathi kwezici ezine eziyinhloko ezithonyayo, inani lika-D kanye nobukhulu bongqimba lwe-dielectric kunqunywa izici zefilimu. Inani lika-dk lefilimu elibunjiwe lingalinganiswa ngefomula elandelayo.

Dk=6.01-3.34RR: Okuqukethwe kwe-resin%

Ngakho-ke, inani lika-dk elisetshenziswa uma kulinganiswa i-impedance lingabalwa ngokusekelwe esilinganisweni sendwangu ye-fiber yengilazi kanye ne-resin ekuhlanganiseni kwefilimu e-laminated.

Ubukhulu bangempela be-PP ngemuva kokugcwalisa bubalwa ngale ndlela elandelayo:

Ubukhulu ngemva kokucindezela kwe-PP

1. Ukuqina = ukujiya kwethiyori yokulahlekelwa kokugcwalisa okukodwa kwe-PP

2. Ukulahlekelwa kokugcwalisa = (1-A ungqimba lwangaphakathi olungaphakathi lwefoyili yethusi isilinganiso sethusi) x ugqinsi lwecwecwe lethusi elingaphakathi ungqimba + (1-B ngaphezulu kwesendlalelo se-copper esale isilinganiso sensalela yethusi) x ugqinsi lwecwecwe lethusi elingaphakathi/3, ungqimba lwangaphakathi Olusele isilinganiso sethusi = indawo yezintambo zangaphakathi / yonke indawo yebhodi

Amazinga ethusi ayinsalela ezendlalelo ezimbili zangaphakathi emdwebeni ongenhla ami kanje:

Sicela unake ifomula engenhla. Uma sibala ukulahlekelwa kokugcwalisa kwesendlalelo sangaphandle sesibili, sidinga kuphela ukubala uhlangothi olulodwa, hhayi izinga lethusi elisele lesendlalelo sangaphandle. Ngokulandelayo:

Ukugcwalisa ukulahleka = (1-ingaphakathi le-copper foil residual rate yethusi) x ukuqina kwe-copper yangaphakathi

Idizayini yesakhiwo sokucindezela

(1) Ingqikithi ezacile enogqinsi olukhudlwana iyakhethwa (ukuzinza kwe-dimensional okungcono kakhulu)

(2) I-PP eshibhile ikhethwa (ngohlobo olufanayo lwendwangu yengilazi engu-PP, okuqukethwe kwe-resin akuthinti inani)

(3) Isakhiwo esilinganayo siyancanyelwa ukugwema i-warpage ye-PCB ngemva komkhiqizo oqediwe. Isibalo esilandelayo siyisakhiwo esingenasikali futhi asinconywa.

(4) Ugqinsi longqimba lwe-dielectric》ugqinsi lwecwecwe lethusi elingaphakathi×2

(5) Akuvunyelwe ukusebenzisa i-PP enokuqukethwe kwe-resin ephansi eshidini elilodwa phakathi kwezendlalelo ezingu-1-2 kanye nezingqimba ze-n-1/n, ezifana ne-7628×1 (n inombolo yezendlalelo)

(6) Kuma-prepregs angu-3 noma ngaphezulu ahlelwe ndawonye noma ubukhulu bongqimba lwe-dielectric bukhulu kunama-mils angu-25, ngaphandle kwezingqimba ezingaphandle nezingaphakathi ze-PP, i-PP emaphakathi ithathelwa indawo ibhodi elikhanyayo.

(7) Uma ungqimba lwesibili nongqimba lwe-n-1 kuyithusi elingaphansi elingu-2oz futhi ukujiya kwezingqimba ze-1-2 kanye ne-n-1/n zongqimba oluvikelayo kungaphansi kuka-14mil, akuvunyelwe ukusebenzisa i-PP eyodwa, kanti engaphandle ungqimba ludinga ukusebenzisa okuqukethwe okuphezulu kwe-resin PP. Njengezi-2116, 1080; uma izinga lethusi elisele lingaphansi kuka-80%, zama ukugwema ukusebenzisa i-1080PP eyodwa

(8) Ungqimba lwangaphakathi lwebhodi le-1oz yethusi, lapho ungqimba lwe-1-2 kanye nongqimba lwe-n-1/n lisebenzisa i-1 PP, i-PP idinga ukusebenzisa okuqukethwe okuphezulu kwe-resin, ngaphandle kuka-7628×1

(9) Akuvunyelwe ukusebenzisa i-PP eyodwa kumabhodi anethusi elingaphakathi ≥ 3oz. Ngokuvamile, i-7628 ayisetshenziswa. Ama-PP amaningi ane-resin ephezulu yokuqukethwe kufanele asetshenziswe, njenge-106, 1080, 2116…

(10) Kumabhodi ezendlalelo eziningi anezindawo ezingenakhothusi ezinkulu kuno-3″×3″ noma 1″×5″, i-PP ngokuvamile ayisetshenziswa njengeshidi elilodwa phakathi kwamabhodi ayinhloko.