Ukuze kuqinisekiswe umgangatho wothumelo lwesignali, ukunciphisa ukuphazamiseka kwe-EMI, kwaye uphumelele isatifikethi esifanelekileyo sovavanyo lwe-impedance, PCB Uyilo olungundoqo oluhambelanayo lwesignali luyafuneka. Esi sikhokelo soyilo sisekelwe kwiiparameters zokubala eziqhelekileyo, iimpawu zesignali yemveliso yeTV, iimfuno ze-PCB Layout, ukubala kwesoftware ye-SI9000, ulwazi lwengxelo yomthengisi we-PCB njalo njalo, kwaye ekugqibeleni uze kuyilo olucetyiswayo. Ifanele imigangatho yenkqubo yababoneleli abaninzi bePCB kunye noyilo lwebhodi yePCB eneemfuno zolawulo lokuthintela.

Nye. Uyilo lwephaneli yokuthintela kabini

① Uyilo lomhlaba: ububanzi bomgca, isithuba 7/5/7mil ububanzi bocingo lomhlaba ≥20mil isignali kunye nomgama wocingo lomhlaba 6mil, yonke i-400mil yomngxuma womhlaba; (2) Uyilo olungagungqiyo: ububanzi bomgca, isithuba 10/5/10mil umahluko isibini kunye nomgama phakathi kwesibini ≥20mil (iimeko ezizodwa azinakuba ngaphantsi kwe-10mil) kucetyiswa ukuba lonke iqela lomgca wophawu olwahlukileyo usebenzisa i-envelope. ukukhusela, umqondiso wokwahlukana kunye nokukhusela umgama osezantsi ≥35mil (iimeko ezikhethekileyo azikwazi ukuba ngaphantsi kwe-20mil). 90 ohm umahluko umahluko uyilo olucetyiswayo

Ububanzi bomgca, isithuba 10/5/10mil Ububanzi bocingo olusezantsi ≥20mil Umgama wophawu kunye nocingo olusemhlabeni lwe-6mil okanye i-5mil, umngxuma wokumisa yonke i-400mil; ②Ungaquki uyilo:

Ububanzi bomgca kunye nesithuba 16/5/16mil umgama phakathi kwesibini somqondiso wokwahluka ≥20mil kucetyiswa ukuba isigqubuthelo somhlaba sisetyenziselwe lonke iqela leentambo zophawu olwahlukileyo. Umgama phakathi komqondiso wokuhlukana kunye nekhebula lomhlaba elikhuselekileyo kufuneka libe yi-≥35mil (okanye ≥20mil kwiimeko ezikhethekileyo). Amanqaku aphambili: unike kuqala ukusetyenziswa koyilo lomhlaba ogqunyiweyo, umgca omfutshane kunye nenqwelomoya epheleleyo ingasetyenziswa ngaphandle koyilo lomhlaba ogqunyiweyo; Ukubala parameters: Icwecwe FR-4, ubukhulu ipleyiti 1.6mm+/-10%, ipleyiti dielectric rhoqo 4.4+/-0.2, ubukhulu ubhedu 1.0 oz (1.4mil) solder oyile ubukhulu 0.6±0.2mil, dielectric rhoqo 3.5+/-0.3.

Uyilo lwe-impedance lwemigangatho emibini kunye neyesine

I-100 ohm i-impedance yokwahlukana ekhuthazwayo yobubanzi bomgca kunye nesithuba 5/7/5mil umgama phakathi kwezibini ≥14mil(3W ikhrayitheriya) Qaphela: kucetyiswa ukuba i-envelope yomhlaba isetyenziselwe lonke iqela leentambo zesignali ezahlukeneyo. Umgama phakathi komqondiso wokuhlukana kunye nekhebula lomhlaba elikhuselayo kufuneka libe ubuncinane be-35mil (kungekho ngaphantsi kwe-20mil kwiimeko ezikhethekileyo). I-90ohm i-impedance yokwahlukana Kucetyiswa ukuba ububanzi bomgca woyilo kunye nesithuba 6/6/6mil Umgama wesibini owahlukileyo ≥12mil(3W ikhrayitheriya) Amanqaku aphambili: Kwimeko yentambo ende yokuhlukanisa intambo, kucetyiswa ukuba umgama phakathi kwamacala amabini omgca wokwahlukana we-USB. usonge umhlaba nge-6mil ukunciphisa umngcipheko we-EMI (songa umhlaba kwaye ungasonge umhlaba, ububanzi bomgca kunye nomgangatho womgama womgca uyahambelana). Iiparamitha zokubala: Fr-4, plate ubukhulu 1.6mm +/-10%, plate dielectric rhoqo 4.4+/-0.2, Copper ubukhulu 1.0oz (1.4mil) semi-cured sheet (PP) 2116 (4.0-5.0mil), dielectric rhoqo 4.3+/ -0.2 ubukhulu beoli ye-solder 0.6±0.2mil, Idielectric engaguquguqukiyo 3.5+/-0.3 ubume obulaminethiweyo: umaleko woshicilelo lwescreen solder umaleko wobhedu umaleko wobhedu onesiqingatha- wanyangwa ifilimu egqunywe ngefilimu yobhedu esemi-cured ifilimu yobhedu umaleko wesolder wescreen sokuprinta

Ntathu. Uyilo lwebhodi ye-impedance emithandathu

Ulwakhiwo olunemigangatho emithandathu luhlukile kwizihlandlo ezahlukeneyo. Esi sikhokelo sincoma kuphela ukuyila kwe-lamination eqhelekileyo (jonga i-FIG. 2), kunye noyilo olulandelayo olucetyiswayo lusekelwe kwidatha efunyenwe phantsi kwe-lamination kwi-FIG. 2. Uyilo lwe-impedance yoluhlu lwangaphandle lufana nebhodi yebhodi emine. Ngenxa yokuba umaleko wangaphakathi unomaleko weplanethi ngokubanzi kunomaleko ongaphezulu, indawo ye-electromagnetic yahlukile kumaleko womphezulu. Ezi zilandelayo ziziphakamiso zokulawulwa kwe-impedance yoluhlu lwesithathu lwe-wiring (i-laminated reference Figure 4). I-90 ohm i-impedance yokwahlukana Kuyacetyiswa ukuba ububanzi bomgca woyilo, umgama womgca 8/10/8mil Ukwahlukana kweperi umgama ≥20mil (3W inqobo); Iiparamitha zokubala: Fr-4, plate ubukhulu 1.6mm +/-10%, plate dielectric rhoqo 4.4+/-0.2, Copper ubukhulu 1.0oz (1.4mil) semi-cured sheet (PP) 2116 (4.0-5.0mil), dielectric rhoqo 4.3+/ -0.2 ubukhulu beoli ye-solder 0.6±0.2mil, Idielectric engaguquguqukiyo 3.5+/-0.3 ubume obulaminethiweyo: iscreen esiphezulu sivala umaleko wobhedu semi-cured copper-coated substrate semi-cured copper-coated substrate semi-cured copper-coated layer blocking layer

Ngaphezulu kwemigangatho emine okanye emithandathu, nceda uyila ngokwakho ngokwemigaqo efanelekileyo okanye udibane nabasebenzi abafanelekileyo ukugqiba isakhiwo se-lamination kunye neskimu socingo.

5. Ukuba kukho ezinye iimfuno zolawulo lokuthintela ngenxa yeemeko ezizodwa, nceda uzibale ngokwakho okanye uqhagamshelane nabasebenzi abafanelekileyo ukugqiba iskimu soyilo.

Qaphela: ① Kukho iimeko ezininzi ezichaphazela i-impedance. Ukuba i-PCB kufuneka ilawulwe yi-impedance, iimfuno zolawulo lwe-impedance kufuneka ziphawulwe ngokucacileyo kwidatha yokuyila ye-PCB okanye ishidi lesampula; (2) I-impedance ye-100 ohm eyahlukileyo isetyenziselwa ikakhulu kwi-HDMI kunye neempawu ze-LVDS, apho i-HDMI idinga ukudlula isatifikethi esifanelekileyo sinyanzelekile; ③ 90 ohm umahluko umahluko isetyenziswa ikakhulu isignali USB; (4) I-Single-terminal 50 ohm impedance isetyenziswa ikakhulu kwinxalenye yesignali yeDDR. Ekubeni amaninzi amasuntswana e-DDR amkela uhlengahlengiso lwangaphakathi oluhambelana noyilo lwe-impedance, uyilo lusekelwe kwibhodi yeDemo enikezelwe yinkampani yesisombululo njengesalathiso, kwaye esi sikhokelo soyilo asikhuthazwa. ⑤, i-single-end 75-ohm impedance isetyenziswa ikakhulu kwigalelo levidiyo ye-analog kunye nemveliso. Kukho uxhathiso lwe-75-ohm oluhambelana nokuchasana komhlaba kuyilo lwesekethe, ngoko akuyomfuneko ukwenza uyilo oluhambelana ne-impedance kwi-Layout yePCB, kodwa kufuneka kuqatshelwe ukuba ukuxhathisa kwe-75-ohm kumgca kufuneka kubekwe kufutshane. kwiphini yesiphelo. PP esetyenziswa ngokuqhelekileyo.