Yon mask soude, konnen tou kòm yon mask soude bloke, se yon kouch mens nan polymère itilize sou Komisyon Konsèy PCB yo anpeche jwenti soude soti nan fòme Pon. Mask la soude tou anpeche oksidasyon ak aplike nan tras yo kòb kwiv mete sou tablo a PCB.

What is PCB solder resistance type? The PCB welding mask acts as a protective coating on the copper trace line to prevent rust and prevent solder from forming Bridges that lead to short circuits. Gen 4 kalite prensipal PCB soude mask – likid epoksidik, likid fotogramabl, fim sèk fotogramabl, ak mask tèt ak anba.

Kat kalite mask soude

Soudi mask varye nan fabrike ak materyèl. Ki jan ak ki mask soude yo itilize depann sou aplikasyon an.

Kouvèti bò anwo ak anba

Top ak anba mask soude Enjenyè elektwonik souvan itilize li nan idantifye ouvèti nan kouch nan baryè vèt soude. Kouch la pre-ajoute pa résine epoksidik oswa teknoloji fim. Broch yo eleman yo Lè sa a, soude sou tablo a lè l sèvi avèk yon ouvèti ki anrejistre ak mask la.

The conductive trace pattern on the top of the circuit board is called the top trace. Menm jan ak mask la bò tèt, se mask la bò anba itilize sou bò ranvèse nan tablo a sikwi.

Mas epoksidik soude likid

Epoxy resins are the cheapest alternative to welding masks. Epoxy is a polymer that is screen printed on a PCB. Enprime ekran se yon pwosesis enprime ki itilize yon rezo twal pou sipòte yon modèl bloke lank. The grid allows identification of open areas for ink transfer. In the final step of the process, heat curing is used.

Likid optik mask soude D ‘

Likid mask fotokonduktif, ke yo rele tou LPI, se aktyèlman yon melanj de likid diferan. Liquid components are mixed prior to application to ensure a longer shelf life. It is also one of the more economical of the four different PCB solder resistance types.

LPI ka itilize pou enprime ekran, penti ekran oswa aplikasyon pou espre. The mask is a mixture of different solvents and polymers. Kòm yon rezilta, penti mens ka ekstrè ki konfòme yo ak sifas la nan rejyon an sib. Mask sa a fèt pou mask soudaj, men pkb la pa mande pou okenn nan penti final yo souvan disponib jodi a.

Kontrèman ak pi gran lank epoksidik, LPI se sansib a limyè iltravyolèt. Panèl la bezwen kouvri ak yon mask. Apre yon kout “sik geri”, tablo a ekspoze a limyè iltravyolèt lè l sèvi avèk fotolitografi oswa lazè iltravyolèt.

Before applying the mask, the panel should be cleaned and free of oxidization. Sa a se fè avèk èd nan solisyon chimik espesyal. Sa a ka tou fè lè l sèvi avèk yon solisyon ALUMINA oswa pa épuration panno yo ak yon wòch pons sispann.

One of the most common ways to expose panel surfaces to UV is by using contact printers and film tools. The top and bottom sheets of the film are printed with an emulsion to block the area to be welded. Use the tools on the printer to fix the production panel and film in place. The panels were then simultaneously exposed to an ULTRAVIOLET light source.

Yon lòt teknik itilize lasers pou kreye imaj dirèk. But in this technique, no film or tools are needed because the laser is controlled using a reference mark on the panel’s copper template.

Mas LPI ka jwenn nan yon varyete koulè, ki gen ladan vèt (ma oswa semi-enteprete), blan, ble, wouj, jòn, nwa, ak plis ankò. Endistri a ki ap dirije ak aplikasyon pou lazè nan endistri elektwonik la ap ankouraje manifaktirè yo ak konsèpteur yo devlope pi fò materyèl blan ak nwa.

Sèk fim foto soude mask soude

A dry film photoimagable welding mask is used, and vacuum lamination is used. Se fim nan sèk Lè sa a, ekspoze ak devlope. After the film is developed, openings are positioned to produce patterns. Apre sa, se eleman nan soude nan pad an brazaj. Lè sa a, kwiv la laminated sou tablo sikwi a lè l sèvi avèk yon pwosesis elèktrochimik.

Se kwiv la kouch nan twou a ak nan zòn nan tras. Eten te evantyèlman itilize pou ede pwoteje sikwi kwiv yo. In the final step, the membrane is removed and the etching mark is exposed. Metòd la itilize tou geri chalè.

Dry film welding masks are commonly used for high-density patch boards. Kòm yon rezilta, li pa vide nan twou a. These are some of the positives of using a dry film welding mask.

Deside ki mask soude yo itilize depann sou divès faktè – ki gen ladan gwosè fizik la nan PCB a, aplikasyon final la yo dwe itilize, twou yo, eleman yo yo dwe itilize, Worcester yo, Layout nan sifas, elatriye.

Pifò desen modèn PCB ka jwenn soude foto rezistan fim. Therefore, it is either LPI or dry film resistance film. The surface layout of the board will help you determine your final choice. If the surface topography is not uniform, the LPI mask is preferred. If a dry film is used on uneven terrain, gas may be trapped in the space formed between the film and the surface. Therefore, LPI is more suitable here.

Sepandan, gen enkonvenyan lè l sèvi avèk LPI. Its comprehensiveness is not uniform. You can also get different finishes on the mask layer, each with its own application. For example, in cases where solder reflow is used, the matte finish will reduce solder balls.

Build solder masks into your design

Building a solder resist film into your design is indispensable to ensure the mask application is at the optimal level. When designing a circuit board, the welding mask should have its own layer in the Gerber file. In general, it is recommended to use a 2mm border around the function in case the mask is not fully centered. Ou ta dwe tou kite yon minimòm de 8mm ant kousinen yo asire ke Pon pa fòme.

Thickness of welding mask

Thickness Welding mask will depend on the thickness of the copper trace on the board. An jeneral, yon mask soude 0.5mm pi pito pou maske liy tras yo. If you are using liquid masks, you must have different thicknesses for different features. Zòn vid Plastifye ka gen yon epesè nan 0.8-1.2mm, pandan y ap zòn ki gen karakteristik konplèks tankou jenou ap gen ekstansyon mens (apeprè 0.3mm).

konklizyon

An rezime, konsepsyon mask soude gen yon enpak grav sou fonksyonalite aplikasyon an. Li jwe yon wòl vital nan anpeche rouye ak soude Pon, ki ka mennen nan sikwi kout. Se poutèt sa, desizyon ou bezwen pran an kont faktè sa yo diferan mansyone nan atik sa a. Espere ke atik sa a ka ede ou pi byen konprann TIP fim PCB rezistans lan. Si ou gen nenpòt kesyon, oswa jis bezwen kontakte nou, nou toujou kontan ede ou.