Kugadzirwa kweiyo multilayer PCB (yakadhindwa redunhu bhodhi) inogona kuve yakaoma kwazvo. Icho chokwadi chekuti dhizaini inotoda kushandiswa kweanopfuura maviri matanda zvinoreva kuti iyo inodiwa nhamba yematunhu haigone kuiswa chete pane yepamusoro uye pasi nzvimbo. Kunyangwe dunhu racho richikwanisika mumatare maviri ekunze, iyo PCB Designers inogona kusarudza kuwedzera simba uye pasi matanda mukati mekugadzirisa maitiro ekuita.

Kubva pamatanho ekuvaraira kuti agadzirise EMI (Electromagnic kukanganiswa) Nekudaro, kunyangwe basa rako rekutanga semugadziri kururamisa matambudziko emagetsi, zvakakoshawo kuti usarega kugadziriswa kwemuviri kwedunhu redunhu. Magetsi magetsi mabhodhi anogona kunge achiri kukotama kana kusvetuka, kuita musangano kuoma kana kutotadza. Neraki, tarisa kune PCB yemuviri kugadziriswa panguva yekugadzira kutenderera ichadzora matambudziko epamberi. Layer-to-layer chiyero ndechimwe chezvinhu zvakakosha zvechina chakagadzikana wedunhu redunhu.

01
Balated PCB Stacking

Yakarongeka kutumbuka ndeye stack umo iyo layer pamusoro uye kuyambuka-chikamu cheiyo dunhu redunhu redunhu vari vaviri vanonzwisisika. Chinangwa ndechekubvisa nzvimbo dzingave dzinodzika kana dzichiiswa mukushushikana panguva yekugadzira maitiro, kunyanya panguva yekuomerwa. Kana dunhu redunhu rakaremara, zvakaoma kuiisa pasi pegungano. Izvi zvinonyanya kuitika kumabhodhi edunhu anozounganidzwa pane automated pagomo uye nzvimbo dzekuiswa. Muzviitiko zvakanyanyisa, defformation inogona kutadzisa gungano revakuru PCBA (rakadhindwa wedunhu rekirabhu musangano) mune yekupedzisira chigadzirwa.

IPC's Ongdection zviyero zvinofanirwa kudzivirira iyo yakawanda yakakotama mapuranga kubva pakusvika kune yako michina. Zvakangodaro, kana iyo PCB Mugadziri maitiro isiri zvachose kunze kwekutonga, saka iyo inokonzeresa yakakanganisika yakakotama ichiripo kune iyo dhizaini. Naizvozvo, zvinokurudzirwa kuti unyatso tarisa PCB chimiro uye ita kuti gadziriswe usati waisa yako yekutanga prototype kurongeka. Izvi zvinogona kudzivirira gohwo risingaperi.

02
Circuit Board Chikamu

Chikonzero chakajairika-chakabatana ndechekuti iyo yakadhindwa redunhu board hadzizokwanire gomba rinogamuchirwa nekuti rayo muchinjiko-chikamu chimiro chiri Asymmetric nezve pakati penzvimbo yayo. Semuenzaniso, kana dhizaini ye8-layer ichishandisa 4 chiratidzo pamusoro penzvimbo inovhara marongero emunharaunda, apo zvinyorwa zvacho zvichikweretesa nekudzvinyirira nekumanikidza, iyo laminate icharemara.

Naizvozvo, inzira yakanaka yekugadzira stack kuitira kuti mhando yemhangura layer (ndege kana chiratidzo) inoratidzwa neruremekedzo pakati nepakati. Mune nhamba iri pazasi, iyo yepamusoro uye yepasi mhando mechi, l2-l7, l3-l6 uye l4-l5 mechi. Pamwe iyo yekuvhara kwemhangura pane ese masangano emasangano anoenzaniswa, nepo chirongwa chekuronga chinonyanya kuumbwa nechisimba chakasimbiswa copper copper copper. Kana izvi zvirizvo, ipapo iyo redunhu bhodhi ine mukana wakanaka wekupedzisa flat, flat pamusoro, iyo yakakodzera yegungano otomatiki.

03
PCB dielectric layer gobvu

Iyo zvakare tsika yakanaka yekuyera huwandu hwedanho rechikafu cheturu chose. Zvakanakisa, ukobvu hweumwe neumwe dielelectric layer zvinofanirwa kuiswa nenzira yakafanana neyekunyorwa kwerudzi rwakagarwa.

Kana ukobvu kwakasiyana, kungave kwakaoma kuwana boka rekunyama iro riri nyore kugadzira. Dzimwe nguva nekuda kwezvinhu zvakadai seanonzi Antenna anoteedzera, nekuti chinhambwe chakakura kwazvo pakati peAntenna trace uye ndege yayo yekunongedzera, asi ndokumbirawo uwedzere kuongorora uye kupererwa zvese usati waenderera. Dzimwe sarudzo. Kana kusarudzika dielectric kupatsanurirwa, vagadziri vazhinji vanozobvunza kuti vazoregedze kana kusiya zvachose uta uye twist tylerances, uye kana vasingakwanise kukanda mapfumo pasi, vangatorega basa. Ivo havadi kuvaka zvakare akati wandei anodhura mabheji ane yakaderera goho, uyezve pakupedzisira tora zvakakwana zvikamu zvekukwana kuti usangane neyekutanga kuraira huwandu.

04
PCB gobvu dambudziko

Uta uye twist zviratidziro dzakajairika dzakanaka. Kana stack yako isingaenzaniswi, pane chimwezve mamiriro ezvinhu anokonzeresa kupokana mukuongorora kwekupedzisira - iyo PCB yakakora katsi pane nzvimbo dzakasiyana padunhu redunhu richachinja. Aya mamiriro ezvinhu anokonzerwa nekuratidzika kunge kudiki dhizaini uye haina kujairika, asi zvinogona kuitika kana chimiro chako chenguva dzose chakagara chisina kufukidzwa chivharo pane akawanda matanda munzvimbo imwechete. Zvinowanzoonekwa pamabhodhi anoshandisa kanokwana maviri maunzi emhangura uye nhamba yakakwira yezviyero. Chii chakaitika ndechekuti imwe nharaunda yebhodhi yaive nehuwandu hwakadururwa nenzvimbo yemhangura, nepo chimwe chikamu chaive chisina kusununguka kwemhangura. Pakareruka matanda aya padzakavharirwa pamwe chete, iro rutivi rwemberi rwevheni rinodzvanywa pasi kune ukobvu, nepo marara-akasununguka kana mhangura-yemahara chikamu chakamanikidzwa pasi.

Mabhodhi ematunhu mazhinji achishandisa hafu yaunzi kana 1 ounce yemhangura hahunganganwe zvakawanda, asi kurema mhangura, kurasikirwa kwakakura kwazvo. Semuenzaniso, kana iwe uine zvikamu zvisere zvematanho matatu emapuranga emhangura, nzvimbo dzine maronda emhangura yekuvhara inogona kuwira pasi pasi pehurefu hwakazara kushivirira. Kuti udzivise izvi kubva kuitika, ita shuwa yekudurura iyo mhangura ichiteerera munzvimbo yese yejira. Kana izvi zvisingabatsiri pamagetsi kana kurema maratidziro, zvingangowedzera kuwedzera mamwe maburi pamakomba echiedza chivharo uye ita chokwadi chekubatanidza mapadha emakomba pane rimwe nerimwe dura. Aya egomba / matanda emadapuri anopa rutsigiro rwemukati pane y axis, nekudaro achidzora kurasikirwa kwakasimba.

05
Chibayiro chinobudirira

Kunyangwe paunenge uchigadzira uye kuuratidza-mitezo PCBs, iwe unofanirwa kutarisisa kune zvese zvemagetsi kuita uye chimiro chemuviri, kunyangwe iwe uchifanira kukanda mapfumo pasi pane izvi zviviri zvikamu kuti zviwane maitiro anoshanda uye anogadzira ivhu. Paunenge uchiyera sarudzo dzakasiyana siyana, ramba uchifunga kuti kana zvichinetsa kana zvisingaite kuzadza chikamu chekusvibiswa kweuta uye mafomu akasvinwa, dhizaini ine maitiro akakwana haashandiswi zvishoma. Balance iyo stack uye teerera kune iyo mhangura yekugovera pane imwe neimwe gayer. Matanho aya anowedzera mukana wekupedzisira kuwana redunhu bhodhi iro riri nyore kuunganidza uye kuisa.