For a few years, manufacturers of complex printed circuit boards are additional challenges caused by high-performance materials. They are used in particular in lead-free applications, high-frequency and high-temperature applications, telecommunications and medical technology. Halogen-free materials and laminates with different fillers influence greatly the properties and service life of carbide tools normally used the world for the machining of printed circuit boards. Required parameter reduction and significantly shorter tool life lead to cost increases in the departments with machining. To meet the demands, ultimately more and more PCB manufacturer switch to diamond coated tools for the machining of printed circuit boards. A. understanding the diamond coating with a special multilayer diamond coating, as in picture 1 and 2 representing the cutting range of tools is coated.
Figure 1: GCT multilayer diamond coating image 2: GCT cutter type 1700 real diamond layers can only in the CVD process (chemical vapor deposition) deposited; see fig. 3 and 4 fig. 3: CVD process schematic Figure 4: GCT diamond coating systems due to the high process temperatures of > 800 C in the CVD process, only solid carbide tools from shared carbide grades can be used. The respective duration of the coating depends on the layer thickness and can take up to 46 hours. Other factors on the duration of the coating are diameter, usage conditions, geometry and tool type. B.
features the GCT diamond layer of b impact: extremely abrasionsbestandig b less wear, longer service life o high hardness of 10,000 HV0. 05 b less wear, longer service life o high thermal conductivity b less wear, better quality o glide b improved chip evacuation and quality o higher feed rates for aluminum possible b productivity C. applications, advantages and Examples of 1 GCT cutter type 1700 – milling inner and outer contours and cutting benefits of assembled PCBs – suitable for halogen-free material, high TG up to 185 C and laminates with fillers – significantly reduced Burr and improved surface quality – very high dimensional accuracy and process capability through extremely rigid geometry 1.1 application example: – halogen-free material, 1.00 mm stack – GCT type 1700 o 1.00 x 5.20 mm in the 3-series thick spiral length – 48000 rpm speed – feed 0.40 m/min – stand way? 100 m 1.2 application example: – halogen-free material, 1.00 mm stack – GCT type 1700 o 1.60 x 7.50 mm in the 4 thick spiral length – speed 36000 RPM – feed 0.60 m/min – stand way? 250 m of 2 GCT cutter type 1750 – perfectly suitable for laminates with ceramic fillers and high TG material? 200 C such as RO4xxx, Arlon 25 x, Isola IS 620 – very high dimensional accuracy and process capability through extremely rigid geometry and a stronger diamond layer 2.1 application example:-RO 4350, 6 ML, 1.80 mm thick bearing the double stack – GCT type 1750 o 2.00 x 9.00 mm spiral length – 29000 rpm – speed feed 1.00 m/min – stand way?