Ị ghọtara iwu abụọ nke PCB laminated imewe?

Ihe na-esonụ bụ ihe atụ nke mkpokọ oyi akwa abụọ ruo asatọ:

• bọọdụ PCB otu akụkụ na osisi PCB nwere akụkụ abụọ

Maka akwa abụọ, n'ihi na ọnụ ọgụgụ nke ọkwa dị ntakịrị, ọ dịghị nsogbu lamination.A na-atụle njikwa radieshon EMI site na wiring na nhazi ya;

Ndakọrịta electromagnetic nke otu - oyi akwa na okpukpu abụọ - oyi akwa na-aghọwanye nke ọma.Isi ihe kpatara ihe a bụ na mpaghara nke akara mgbama dị oke ibu, nke na-abụghị nanị na-emepụta radieshon electromagnetic siri ike, ma na-emekwa ka sekit ahụ nwee mmetụta nke nnyonye anya nke mpụga.Ụzọ kachasị mfe iji melite ndakọrịta electromagnetic nke ahịrị bụ ibelata mpaghara akaghị nke mgbama dị egwu.

Mgbama dị egwu: Site n'echiche nke ndakọrịta elektrọnik, mgbaama dị egwu na-ezo aka na mgbama na-emepụta radieshon siri ike ma na-enwe mmetụta nke ụwa n'èzí.Mgbama ndị nwere ike iwepụta radieshon siri ike na-abụkarị mgbama oge, dị ka mgbama dị ala nke elekere ma ọ bụ adreesị.Ihe nrịbama nwere mmetụta nnyonye anya bụ ndị nwere akara ngosi analog dị ala.

A na-ejikarị efere otu na okpukpu abụọ mee ihe n'ụdị ịme anwansị dị ala n'okpuru 10KHz:

1) Jigharịa eriri ike na otu oyi akwa n'ụzọ radial, ma belata nchikota ogologo ahịrị;

2) Mgbe ị na-eje ije ọkụ eletrik na waya ala, nso ibe ya;Dina waya ala n'akụkụ waya mgbaama igodo nso ka enwere ike.Ya mere, a na-etolite mpaghara loop dị nta ma na-ebelata mmetụta nke radieshon mode dị iche na nnyonye anya mpụga.Mgbe a na-agbakwunye eriri ala n'akụkụ eriri mgbaàmà, a na-emepụta sekit nwere mpaghara kacha nta, a ga-ebufekwa mgbama ugbu a site na sekit a karịa ụzọ ala ọzọ.

3) Ọ bụrụ na ọ bụ osisi sekit nke okpukpu abụọ, ọ nwere ike ịdị n'akụkụ nke ọzọ nke eriri sekit, nso akara akara n'okpuru ebe a, tinyere eriri akara akara eriri ala, eriri dị ka o kwere mee.Mpaghara sekit na-esi na ya pụta bụ nha nha nke bọọdụ sekit na-abawanye site n'ogologo akara mgbaàmà.

• B. Lamination nke anọ n'ígwé 

1. Sig-gnd (PWR)-PWR (GND)-SIG; 

2. GND-SIG(PWR)-SIG(PWR)-GND; 

Maka atụmatụ abụọ a laminated, nsogbu nwere ike bụ na ọkpụrụkpụ efere 1.6mm (62mil) ọdịnala.Ọpụpụ nke oyi akwa ga-abụ nnukwu, ọ bụghị naanị na ọ ga-ekwe omume ịchịkwa impedance, njikọ interlayer na mkpuchi;Karịsịa, nnukwu ohere dị n'etiti eriri ọkụ ọkụ na-ebelata ikike nke efere ma ghara ịkwado ụda nzacha.

Maka atụmatụ mbụ, a na-ejikarị ya eme ihe na ọnụ ọgụgụ buru ibu nke ibe na osisi.Atụmatụ a nwere ike nweta arụmọrụ SI ka mma, mana arụmọrụ EMI adịghị mma, nke a na-achịkwa nke ọma site na wiring na nkọwa ndị ọzọ.Isi nlebara anya: A na-etinye nhazi ahụ na oyi akwa mgbaàmà nke oyi akwa mgbaàmà kachasị, na-eme ka ịmịnye na nkwụsị nke radieshon;Dịkwuo ebe efere iji gosipụta iwu 20H.

Maka atụmatụ nke abụọ, a na-ejikarị ya ebe njupụta mgbawa dị na osisi dị ala ma nwee ebe zuru oke gburugburu mgbawa iji tinye mkpuchi ọla kọpa achọrọ.N'ime atụmatụ a, oyi akwa nke PCB bụ ihe niile stratum, na etiti abụọ bụ akara ngosi / ike oyi akwa.A na-eji ahịrị obosara na-ebugharị ọkụ ọkụ na oyi akwa mgbama, nke nwere ike ime ka ụzọ mgbochi nke ọkụ eletrik dị ugbu a dị ala, na nkwụsị nke ụzọ microstrip mgbaàmà dịkwa ala, ma nwee ike ichebe radieshon dị n'ime site na mpụta. oyi akwa.Site na nleba anya njikwa EMI, nke a bụ usoro PCB 4-layer kacha mma dị.

Isi nlebara anya: n'etiti abụọ n'ígwé nke mgbaàmà, ike Ịgwakọta oyi akwa spacing kwesịrị imeghe, ntụziaka nke akara bụ vetikal, zere crosstalk;Mpaghara nchịkwa kwesịrị ekwesị, na-egosipụta iwu 20H;Ọ bụrụ na a ga-achịkwa impedance nke wires, jiri nlezianya dobe wires n'okpuru agwaetiti ọla kọpa nke ike na ala.Tụkwasị na nke ahụ, ọkụ ọkụ ma ọ bụ ịkwanye ọla kọpa kwesịrị ijikọ ọnụ dịka o kwere mee iji hụ na DC na njikọ dị ala.

• C. Lamination nke ọkwa isii nke efere

Maka imewe nke njupụta mgbawa dị elu na oge elekere dị elu, a ga-atụle nhazi nke osisi 6-layer.A na-akwado usoro lamination:

1.SIG-GND-SIG-PWR-GND-SIG; 

Maka atụmatụ a, atụmatụ lamination na-enweta ezigbo nguzosi ike n'ezi ihe, na oyi akwa mgbama dị n'akụkụ oyi akwa ala, ike oyi akwa jikọtara ya na oyi akwa nke ala, enwere ike ịchịkwa ihe mgbochi nke oyi akwa ọ bụla, na nke abụọ nwere ike ịmịnye ahịrị magnet nke ọma. .Tụkwasị na nke ahụ, ọ nwere ike inye ụzọ nloghachi ka mma maka oyi akwa mgbaàmà ọ bụla n'okpuru ọnọdụ nke ike zuru ezu na nhazi.