Performance requirements, standards and related testing methods of metal based copper clad laminate

1. Performance requirements and standards In the early 70s, industrial developed countries, such as Japan, have been able to produce aluminum based copper clad plates and achieve industrial production in the early 70s, but the Japanese industrial standard (JIS) has not formulated aluminum based copper clad plate standards. So far, internationally influential standardization organizations such as IPC, IEC, NEMA and ASTM have not yet established standards for aluminum based CCL. In China, with the gradual expansion of the aluminum based copper clad plate market, PCB and the copper clad plate industry urgently require the industry standard for aluminum based copper clad plate. In 1999, the 704 factory was responsible for drafting the standard for the military standard of the electronic industry, the flame retardant aluminum based clad laminate. The main technical requirements are as follows. 1. size requirements (1) the nominal plate size and allowable deviation of the size and deviation aluminum base clad board shall be in accordance with table 5-3, and the size and deviation of the non nominal plate surface shall be agreed upon by the supplier and the supplier. (2) nominal thickness and deviation nominal thickness and deviation of aluminum base clad foil should comply with table 5-4. (3) perpendicularity of the aluminum clad aluminum plate with perpendicularity is checked according to GB/T 4722, and shall comply with the regulation of table 5-5. (4) warpage of aluminum based clad foil should conform to table 5-6 when checked according to GB 4677.5. 1 when the warpage is measured, the specimen size should not be greater than 300mmx300mm. If the whole plate or side length is greater than 300mm, it should be cut into 300mmx300mm. But the length of the measured side is the length of the measured side. 2. appearance 1 aluminum base clad foil face should be neat, no lamination, crack and burr. 2 the aluminum plate is smooth, and the oxide film is uniform and smooth. There should be no defects such as dents, cracks, scratches, etc. 3 copper foil should not be affected by bubbles, wrinkles, pinholes, scratches, pockmarks and glue dots. Any discolouration or fouling should be cleaned with a hydrochloric acid solution of 1.02g/c density or suitable organic solvent. 3. performance requirements The performance of aluminum clad foil should meet the requirements of table 5-7. 1 the performance index of dielectric constant and dielectric loss tangent of LI-11 type aluminum base clad laminate under high frequency is negotiated between the supplier and the buyer. Two, the inspection method of aluminum based copper clad plate In the electronic industry standard "flame retardant aluminum based copper clad laminate specification", two special methods for the detection of aluminum based copper clad laminate have been developed. 1 dielectric constant and dielectric loss tangent measurement method -- variable Q value series resonance method; 2 method of thermal resistance measurement. 1. dielectric constant and dielectric loss tangent measurement method -- variable Q value series resonance method 1) this method uses the principle of connecting the sample and the tuned capacitance in series to the high frequency circuit, measuring the E value of the quality factor of the series circuit, measuring the dielectric constant and dielectric loss factor of the large capacitance, small resistance, small inductance plate like sample, and the measurement circuit as shown in Figure 5-3. 3) equipment, instruments and materials 1 eddy current thickness gauge (TC-103 or equivalent instrument), range 0~200 to m) accuracy to +-1/1m.. 2 the Q value of the Q table is 10~600, the capacitance measurement range is 0~400pF, and the accuracy is +-0.2pF. The 3 electrode device should be clean and its dielectric loss should be as small as possible. Adopt two electrode system, electrode size and other requirements according to GB1409 regulations. 4 0.02mm annealed aluminum foil. 5 medical Vaseline or silicone. 6 high frequency oscillating power, frequency 0.1~100MHz. 3) sample 1 cut the square specimens of 4 pieces of 55mmx55mm. 2 etching the copper foil by the GJB 1651 method 3031. 4) program 1 use a very small amount of medical materials such as Vaseline or silicone grease to affixed the aluminum foil to the sample. The holes and wrinkles should not be seen on the aluminum foil affixed to it. 2 pretreat the sample according to the product standard, then attach the electrode with 50 mm, and the upper and lower electrodes are concentrically aligned. 3 connect the series clamp and microelectrode according to the circuit diagram. 4 adjust the frequency and select the appropriate auxiliary inductance to access the circuit. 5 put the test sample into the microelectrode and tighten it. 6 tighten the short circuit ring on the series clamp, make the test sample short circuit, adjust the tuning capacitor, make the test loop resonate, record C1 and Q1. 7 release the short circuit ring, make the test sample access the test loop, adjust the tuning capacitor again, make the test loop resonate, record Q2 and C2. 8 measure the insulation thickness of each sample and record the average value of 3 points of each sample. 5) the formula for calculating dielectric loss tangent and dielectric constant is as follows: 6) results 1 the average value of dielectric constant of the 4 sample is the test result. 2 the average value of dielectric loss tangent of the 4 samples is the test result. 7) report The single and average values of 13 samples were measured. The preconditioning conditions of 2 samples; 3 the environmental conditions at the time of determination; 4 any abnormal phenomena in the determination or differences with the prescribed procedures. 2. method of thermal resistance test The method principle temperature difference is the driving force of heat transfer. Under stable working conditions, the thermal conductivity is P=T1-T2/R, P is the heat conduction (W), T1 and T2 are the surface temperature (c) on both sides of the body, and R is the thermal resistance (C /W). A schematic diagram of thermal resistance measurement is shown in Figure 5-4. 2) instrument and equipment materials The 1 power transistor is 1, the power is 5W, and its packaging is TO-220. The 1 power supply of 2 power triode (composed of DC voltage regulator and related circuits) makes the transistor in DC steady state. 3 1 radiators are made of copper and placed in constant temperature flume. 4 thermometer 2, the temperature sensor can be placed in the two temperature points shown in Figure 5-4, the impact on the two points temperature can be ignored. 3) the size of the sample two is 30mmx40mmx thick. 4) program 1 the sample should be treated at temperatures of 15~35, 45%~75% and 86~106kPa, not less than 16h. 2 as shown in Figure 5-4, the thermometer's sensor is placed in the temperature measurement point 1 and the temperature measuring point 2, and the contact part of the sample and the triode tube and the contact part of the radiator and the specimen are coated with thermal silicone grease, and the three are fixed together so that there is no gap between the triode and the sample, the sample and the radiator. 3 connect the triode and the power supply. 4 open the power supply switch and record the temperature of temperature point 1 and temperature point 2 every 5min. When the temperature is stable (about 30min), T1 and T2 are read out from the temperature display. The voltage VcE and collector current Ic between the collector and emitter of the triode are measured. Three, UL certification of aluminum based copper clad plate The product UL certification is the passport of the product entering the international market, the safety standard of the industrial laminates used for printed wiring UL746E, and the rigid Industrial Laminates of the UL/ANSI type logo should be passed through 16 test items, and see table 5-8. Performance requirements, standards and related testing methods of metal based copper clad laminate 1. Performance requirements and standards In the early 70s, industrial developed countries, such as Japan, have been able to produce aluminum based copper clad plates and achieve industrial production in the early 70s, but the Japanese industrial standard (JIS) has not formulated aluminum based copper clad plate standards. So far, internationally influential standardization organizations such as IPC, IEC, NEMA and ASTM have not yet established standards for aluminum based CCL. In China, with the gradual expansion of the aluminum based copper clad plate market, PCB and the copper clad plate industry urgently require the industry standard for aluminum based copper clad plate. In 1999, the 704 factory was responsible for drafting the standard for the military standard of the electronic industry, the flame retardant aluminum based clad laminate. The main technical requirements are as follows. 1. size requirements (1) the nominal plate size and allowable deviation of the size and deviation aluminum base clad board shall be in accordance with table 5-3, and the size and deviation of the non nominal plate surface shall be agreed upon by the supplier and the supplier. (2) nominal thickness and deviation nominal thickness and deviation of aluminum base clad foil should comply with table 5-4. (3) perpendicularity of the aluminum clad aluminum plate with perpendicularity is checked according to GB/T 4722, and shall comply with the regulation of table 5-5. (4) warpage of aluminum based clad foil should conform to table 5-6 when checked according to GB 4677.5. 1 when the warpage is measured, the specimen size should not be greater than 300mmx300mm. If the whole plate or side length is greater than 300mm, it should be cut into 300mmx300mm. But the length of the measured side is the length of the measured side. 2. appearance 1 aluminum base clad foil face should be neat, no lamination, crack and burr. 2 the aluminum plate is smooth, and the oxide film is uniform and smooth. There should be no defects such as dents, cracks, scratches, etc. 3 copper foil should not be affected by bubbles, wrinkles, pinholes, scratches, pockmarks and glue dots. Any discolouration or fouling should be cleaned with a hydrochloric acid solution of 1.02g/c density or suitable organic solvent. 3. performance requirements The performance of aluminum clad foil should meet the requirements of table 5-7. 1 the performance index of dielectric constant and dielectric loss tangent of LI-11 type aluminum base clad laminate under high frequency is negotiated between the supplier and the buyer. Two, the inspection method of aluminum based copper clad plate In the electronic industry standard "flame retardant aluminum based copper clad laminate specification", two special methods for the detection of aluminum based copper clad laminate have been developed. 1 dielectric constant and dielectric loss tangent measurement method -- variable Q value series resonance method; 2 method of thermal resistance measurement. 1. dielectric constant and dielectric loss tangent measurement method -- variable Q value series resonance method 1) this method uses the principle of connecting the sample and the tuned capacitance in series to the high frequency circuit, measuring the E value of the quality factor of the series circuit, measuring the dielectric constant and dielectric loss factor of the large capacitance, small resistance, small inductance plate like sample, and the measurement circuit as shown in Figure 5-3. 3) equipment, instruments and materials 1 eddy current thickness gauge (TC-103 or equivalent instrument), range 0~200 to m) accuracy to +-1/1m.. 2 the Q value of the Q table is 10~600, the capacitance measurement range is 0~400pF, and the accuracy is +-0.2pF. The 3 electrode device should be clean and its dielectric loss should be as small as possible. Adopt two electrode system, electrode size and other requirements according to GB1409 regulations. 4 0.02mm annealed aluminum foil. 5 medical Vaseline or silicone. 6 high frequency oscillating power, frequency 0.1~100MHz. 3) sample 1 cut the square specimens of 4 pieces of 55mmx55mm. 2 etching the copper foil by the GJB 1651 method 3031. 4) program 1 use a very small amount of medical materials such as Vaseline or silicone grease to affixed the aluminum foil to the sample. The holes and wrinkles should not be seen on the aluminum foil affixed to it. 2 pretreat the sample according to the product standard, then attach the electrode with 50 mm, and the upper and lower electrodes are concentrically aligned. 3 connect the series clamp and microelectrode according to the circuit diagram. 4 adjust the frequency and select the appropriate auxiliary inductance to access the circuit. 5 put the test sample into the microelectrode and tighten it. 6 tighten the short circuit ring on the series clamp, make the test sample short circuit, adjust the tuning capacitor, make the test loop resonate, record C1 and Q1. 7 release the short circuit ring, make the test sample access the test loop, adjust the tuning capacitor again, make the test loop resonate, record Q2 and C2. 8 measure the insulation thickness of each sample and record the average value of 3 points of each sample. 5) the formula for calculating dielectric loss tangent and dielectric constant is as follows: 6) results 1 the average value of dielectric constant of the 4 sample is the test result. 2 the average value of dielectric loss tangent of the 4 samples is the test result. 7) report The single and average values of 13 samples were measured. The preconditioning conditions of 2 samples; 3 the environmental conditions at the time of determination; 4 any abnormal phenomena in the determination or differences with the prescribed procedures. 2. method of thermal resistance test The method principle temperature difference is the driving force of heat transfer. Under stable working conditions, the thermal conductivity is P=T1-T2/R, P is the heat conduction (W), T1 and T2 are the surface temperature (c) on both sides of the body, and R is the thermal resistance (C /W). A schematic diagram of thermal resistance measurement is shown in Figure 5-4. 2) instrument and equipment materials The 1 power transistor is 1, the power is 5W, and its packaging is TO-220. The 1 power supply of 2 power triode (composed of DC voltage regulator and related circuits) makes the transistor in DC steady state. 3 1 radiators are made of copper and placed in constant temperature flume. 4 thermometer 2, the temperature sensor can be placed in the two temperature points shown in Figure 5-4, the impact on the two points temperature can be ignored. 3) the size of the sample two is 30mmx40mmx thick. 4) program 1 the sample should be treated at temperatures of 15~35, 45%~75% and 86~106kPa, not less than 16h. 2 as shown in Figure 5-4, the thermometer's sensor is placed in the temperature measurement point 1 and the temperature measuring point 2, and the contact part of the sample and the triode tube and the contact part of the radiator and the specimen are coated with thermal silicone grease, and the three are fixed together so that there is no gap between the triode and the sample, the sample and the radiator. 3 connect the triode and the power supply. 4 open the power supply switch and record the temperature of temperature point 1 and temperature point 2 every 5min. When the temperature is stable (about 30min), T1 and T2 are read out from the temperature display. The voltage VcE and collector current Ic between the collector and emitter of the triode are measured. Three, UL certification of aluminum based copper clad plate The product UL certification is the passport of the product entering the international market, the safety standard of the industrial laminates used for printed wiring UL746E, and the rigid Industrial Laminates of the UL/ANSI type logo should be passed through 16 test items, and see table 5-8.