The so-called copper coating is to take the idle space on the PCB as referinsjenivo, en folje dan mei bêst koper, wurde dizze kopergebieten ek kopervulling neamd. De betsjutting fan kopercoating is om de impedânsje fan grûndraad te ferminderjen en it fermogen fan anty-ynterferinsje te ferbetterjen. Ferminderje spanningfal, ferbetterje effisjinsje; Connecting to the ground also reduces the loop area.

Wat binne de foardielen en neidielen by it dekken fan PCB -koper

Copper covering is an important part of PCB design. Both domestic Qingyuefeng PCB design software and some foreign Protel and PowerPCB provide intelligent copper covering function. So how to apply copper well, I will share some of my ideas with you, hoping to bring benefits to peers.

The so-called copper coating is to take the idle space on the PCB as a reference level, and then fill with solid copper, these copper areas are also called copper filling. De betsjutting fan kopercoating is om de impedânsje fan grûndraad te ferminderjen en it fermogen fan anty-ynterferinsje te ferbetterjen. Ferminderje spanningfal, ferbetterje effisjinsje; Connecting to the ground also reduces the loop area. Om de deformaasje fan PCB-lassen te minimalisearjen, fereaskje de measte PCB-fabrikanten ek PCB-ûntwerpers om koperhûd as roaster-achtige grûndraad yn it iepen gebiet fan PCB te foljen. As koperbedekking net goed wurdt behannele, sil it net wurde beleanne en ferlern. Is koperbedekking “mear goed dan kwea” as “mear skea dan goed”?

Under de betingst fan hege frekwinsje is foar elkenien bekend, op ‘e printplaat sil bedradingskapasiteit wurkje, as de lingte mear dan 1/20 is fan’ e lûdfrekwinsje korrespondearjende golflengte, it antenne -effekt kin produsearje, sil it lûd lansearje fia bedrading , as d’r min koper beklaaid is yn ‘e PCB, waard koperbeklaaid it ark foar transmisjelûd, dus yn’ e hege frekwinsjekring, Tink net dat de grûn earne ferbûn is mei de grûn, dit is de “grûn”, minder dan λ/20 moat wêze fan ‘e ôfstân, yn’ e bedradingsgat, en de flier fan ‘e mearlagerplank “goede grûning”. As de kopercoating goed wurdt behannele, fergruttet de kopercoating net allinich de stroom, mar spilet it ek in dûbele rol by it beskermjen fan ynterferinsje.

Copper covering generally has two basic ways, is a large area of copper covering and grid copper, often someone asked, a large area of copper covering or grid copper covering is good, bad generalization. Wêrom is dat? Large area copper coating, with increased current and shielding dual role, but large area copper coating, if the wave soldering, the board may become warped, or even bubble. Therefore, a large area of copper coating, generally also open a few slots, alleviate copper foil foaming, pure grid copper coating is mainly shielding, increase the role of the current is reduced, from the perspective of heat dissipation, grid has the advantage (it reduces the heating surface of copper) and has a certain role in electromagnetic shielding. But it should be pointed out that, the grid is made by alternating direction of running, we know for circuit line width for the work frequency of the circuit board has its corresponding “electricity” length of (actual size divided by the working frequency of the corresponding digital frequency, concrete books), when the working frequency is not very high, Miskien wurkje de roasterlinen net heul goed, mar as de lingte fan ‘e macht ienris oerienkomt mei de bestjoeringsfrekwinsje, is it heul min, en fine jo dat it circuit hielendal net wurket, en d’r oer it heule plak sinjalen gean dy’t ynterferearje mei hoe’t it systeem wurket. So for those who use grid, my advice is to choose according to the design of the circuit board, do not cling to one thing. So the high-frequency circuit against interference requirements of high multi-purpose grid, low-frequency circuit has a large current circuit and other commonly used complete copper laying.

Having said so much, we need to pay attention to those problems in copper cladding in order to achieve the desired effect of copper cladding:

1. If there are many PCB ground, SGND, AGND, GND, etc., it is necessary to use the most important “ground” as the reference to independently coat copper according to the different PCB surface position. It is not mentioned that digital ground and analog ground are separately coated copper, at the same time, before covering copper, the corresponding power cables should be thickened: 5.0V, 3.3V, ensfh Op dizze manier wurde meardere deformaasjestruktueren foarme fan ferskate foarmen.

2. Foar de ienpuntsferbining fan ferskate grûn is de metoade te ferbinen troch 0 ohm ferset as magnetyske kralen as induktânsje;

3. Kopercoating by de kristalloscillator, de kristaloscillator yn ‘e sirkwy is in emisje -boarne mei hege frekwinsje, dat is kopercoating om’ e kristaloscillator, en dan wurdt de shell fan ‘e kristaloscillator apart grûn.

4. Eilân (deade sône) probleem, as jo tinke dat it te grut is, dan is it net folle muoite om in gat te definiearjen en ta te foegjen.

5. Oan it begjin fan ‘e bedrading moat de grûn gelyk behannele wurde. As de tried leit, moat de grûn goed gean.

6. It is better gjin skerpe hoeken op it boerd te hawwen (“= 180 graden”), om’t dit fanút it eachpunt fan elektromagnetisme in transmitterende antenne is!

7. Dekje koper net yn it iepen gebiet fan ‘e bedrading fan’ e middelste laach fan ‘e mearlaach. Om’t it lestich is om de koperbekleding “goed grûnen” te krijen.

8. Soargje derfoar dat de metalen binnen it apparaat, lykas de metalen heatsink en metalen fersterkingsstrip, goed grûn binne.

9. It metaalblok fan ‘e waarmte-dissipaasje fan’ e trije-terminal regulator moat goed grûn wêze. De ierdingsisoleringsriem by de kristaloscillator moat goed ierdich wêze. Koartsein: de kopercoating op PCB, as it aardingsprobleem goed wurdt behannele, is it grif “mear goed dan min”, kin it it weromstreamgebiet fan ‘e sinjaalline ferminderje, it sinjaal eksterne elektromagnetyske ynterferinsje ferminderje.