Ki sa ki Pkb windowing

The wires on the PCB are covered with oil, which can prevent short circuit and damage to the device. The so-called window is to remove the paint layer on the wire, so that the wire can be exposed to tin.

How to design PCB window opening  PCB design how to set wiring window opening

Kòm ou ka wè nan foto ki anwo a, li nan fenèt la. PCB window opening is not uncommon, and the most common one is probably the memory module. Those of you who have disassembled a computer know that the memory module has one gold finger, as shown in the picture below:

How to design PCB window opening PCB design how to set wiring window opening

The golden finger here means open the window, plug and play.

Ouvèti fenèt tou se yon fonksyon trè komen, se sa ki, planch fèblan ogmante epesè nan FOIL kwiv nan etap nan pita, ki se pratik pou aktyèl twòp, ki se komen nan tablo a pouvwa ak tablo kontwòl motè.

Louvri Windows ak klere kòb kwiv mete nan konsepsyon PCB

In the design, we often meet customers’ requirements for opening Windows and brightening copper, but it is very difficult to communicate with them because the customers have little knowledge or we are not very clear about this process. Nan konsepsyon nou an, souvan rankontre kliyan bezwen ajoute yon kouvèti plak pwotèj, kwen plak lokal klere kòb kwiv mete, nan twou a louvri soude rezistans, IC koule chalè tounen ekspoze kòb kwiv mete, yo vòlè li pad fèblan ak sou sa. According to the actual situation, let’s take a look at some pictures to explain.

1. Pwoteksyon kouvèti

Si kliyan an bezwen ajoute pwoteksyon pwoteksyon, sa nou bezwen fè se ajoute soldmask ak yon lajè omwen 1mm. Nou bezwen konfime ak kliyan an si wi ou non nou bezwen ajoute may asye. Lè nou ajoute Soldmask, nou bezwen kouche po kwiv nan rezo tè a nan zòn ajoute Soldmask. Avyon Soldmask la dwe kouvri, sinon yo pral ekspoze substra a (FR4, elatriye). Other non – terrestrial networks should not cross the Soldmask. Add the Soldmask area to the PCB effect to reveal the yellow copper. Unadded areas will be covered by solder blocking.

Ki jan yo desine PCB fenèt ouvèti _PCB konsepsyon ki jan yo mete fil elektrik ouvèti fenèt

2, welding window hole

Nan desen an, nou souvan tande twou a ploge tablo antye oswa twou ploge lokal yo, lè ajoute twou, nou peye atansyon sou non an konpayi ploge twou se jeneralman ravitaye BGA, sou kontrè a, pa gen okenn BGA yo soude twou fenèt (konpayi nou an spesifikasyon). General company specifications exceed 12mil holes must be welded window holes.

Ki jan yo desine PCB fenèt ouvèti _PCB konsepsyon ki jan yo mete fil elektrik ouvèti fenèt

3, IC heat dissipation pad

In general, on the back of IC heat dissipation pad add welding window (add the back soldmask larger than or equal to the surface pad) and hole, and on the back of the copper cover welding, so as to better put the surface heat through the hole to the back of the copper skin better out.

Ki jan yo desine PCB fenèt ouvèti _PCB konsepsyon ki jan yo mete fil elektrik ouvèti fenèt

4. Vòlè kousinen fèblan

In wave soldering, in order to solve the problem of connecting tin caused by the close spacing of pads, we will use tadpole shape of stolen tin pads. Notice the copper skin with the same size as the solder should be added.

Ki jan yo desine PCB fenèt ouvèti _PCB konsepsyon ki jan yo mete fil elektrik ouvèti fenèt

Kouman reyalize fèblan sou fenèt fil elektrik PCB la

The circuit needs to drive the 8-channel relay, when the multi-channel relay is closed when the current increases, in order to ensure the actual effect, in widening the current line at the same time, it is hoped to remove the welding resistance layer of the current line – green oil layer, after the board is made, you can add tin to the top, thickening the line, can pass more current.

The actual results are as follows:

Ki jan yo desine PCB fenèt ouvèti _PCB konsepsyon ki jan yo mete fil elektrik ouvèti fenèt

The implementation method is as follows:

Just draw the line in the ToPlayer (or bottomLayer depending on which layer the preset line is in) layer, and then draw the line that coincides with it in the Topsolder (or bottom solder) layer.

PCB design how to set up the wiring window

Konsepsyon CB ka mete kanpe fil elektrik nan kouch TOP / BOLD SOLDER.

TOP/BOTTOM SOLDER green oil layer: Coat the TOP/BOTTOM layer with SOLDER green oil to prevent tin from coating the copper foil and maintain insulation.

Green oil window blocking can be set on the pad, through hole and non-electrical wiring of this layer.

1. By default, the pad will open a window in PCB design (OVERRIDE: 0.1016mm), that is, the pad exposes copper foil, expands 0.1016mm, and tin will be added during wave soldering. No design changes are recommended to ensure weldability;

2. By default, the hole will open a window in PCB design (OVERRIDE: 0.1016mm), that is, the hole will expose copper foil, expand 0.1016mm, and tin will be added during wave soldering. Si konsepsyon an se anpeche fèblan vini sou twou a ak kòb kwiv mete soti nan soti, ou dwe tcheke opsyon nan pentire nan atribi adisyonèl nan twou a nan SOLDER MASK yo fèmen twou a.

3, in addition, this layer can also be independently non-electrical wiring, welding resistance green oil corresponding window opening. If it is on the copper foil wire, it is used to enhance the current capacity of the wire, and tin processing is added when welding; If it is on the non-copper foil wire, it is generally designed for logo and special character screen printing, and the character screen printing layer can be omitted.