TKC 'AEGIS' Desmear

Cleaning of laser drilled holes and roughening of ABF surface.

Desmear mainly include 3 steps:
1. Swelling: Resin preparation for an optimum attack of the permanganate etch solution – guarantees a micro roughness on the epoxy surface.
2. Micro etching: Chemical treatment to clean Laser via holes and roughen surface for copper adhesion.
The permanganate etching removes epoxy resin swollen in the sweller.
The alkaline permanganate solution (MnO4-) is reduced in the reaction process via the intermediate product Manganese (MnO42-) to non-soluble manganese dioxide (MnO2 = brown stone).
To keep the process capable of reaction, the emerging manganese (MnO42-) will be reoxidized by means of regenerator electrolytic ally to Permanganate (MnO4-).
The brown stone deposited in the module must be removed from the module by means of cleaning.
3. Reduction: Reduction and removal of manganese dioxide residues.

Module Name & Function:
• Loader/Unloader: Panel is loaded from a magazine onto a conveyor, gets centered and transported and loaded into basket.
• Hot rinse: Remove the FM on panel surface and wetting panel before dip into Sweller.
• Sweller: Swell the ABF film and serve purpose of removing the residue due to drilling.
• Hot rinse: The rinse serves the purpose of optimal cleaning of the drilled holes and the panel surface.
• 3 cascaded rinse: Refresh with DI water all the time for better cleaning.
• Micro-etch: Serves the purpose of removing of epoxy resin swollen in the Sweller.
• 2 cascaded hot rinse: Equipped with ultrasonic and heater for better panel surface cleaning.
• 3 cascaded rinse: Refresh with DI water all the time for better cleaning.
• Neutralizer: Reduces the acidic potassium permanganate and totally removes residues from the manganese dioxide.
• 2 cascaded hot rinse: Equipped with ultrasonic and heater for better panel surface and via cleaning.
• 3 cascaded rinse: Equipped with ultrasonic and heater for better panel surface and via cleaning.
• Hot rinse: Last hot rinse, to ensure no chemical and FM residue on Panel surface.
• Dryer: 80℃ temperature can ensure the basket and panel can get dried before go to next step.

Status: Installed

Photos and Downloadable Document from internet or seller for reference only, subject to actual condition.

For more specification details, please click below downloadable document.