Новости PCB - метод контроля качества предварительно пропитанной платы

Quality detection method for electroplating prepreg of плата цепи

предварительно пропитанный материал представляет собой пластину из смолы и носителя. смола находится на уровне B, under the action of temperature and pressure, Он имеет текучесть, может быстро отвернуться и завершить процесс склеивания, and forms an insulating layer together with the carrier. обычно называется препрег или связка. In order to ensure the high reliability and quality stability of the multilayer печатная плата , the quality of the semi-solid film must be tested (trial lamination method). особенности системы плата цепи electroplating prepreg include the characteristics предламинарный and the characteristics after lamination. Свойства перед слоем: содержание смолы, fluidity%, volatile content% and gel time (S). The characteristics after lamination refer to: electrical properties, термоударные свойства и воспламеняемость. поэтому, in order to ensure the high reliability of the multilayer печатная плата стабильность и ламинарный технологический параметр, обнаружение предварительно пропитанных материалов имеет большое значение плата цепи before lamination.
1. Determination of resin content (%) of плата цепи:
(1) Preparation of test piece: According to the fiber direction of the плата цепи electroplating prepreg: cut into 100×100 (mm) small test pieces at a 45° angle;
(2) Weighing: Weigh Wl (grams) using a balance with an accuracy of 0.001 grams;
(три) Heating: heating and burning at a temperature of 566.14 градусов Цельсия длится 60 минут, and then weighing W2 (g) after cooling;
(4) Calculation: W1-W2 resin content (%)=(W1-W2)/WE 1002.
2. Measurement of плата цепи resin flow rate (%):
(1) Test piece production: According to the fiber direction of the плата цепи electroplating prepreg, cut into 100×100 (mm) pieces of about 20 g test pieces at a 45° angle;
(2) Weighing: Use a balance with an accuracy of 0.001 grams to accurately weigh W1 (grams);
(3) Heating and pressing: the temperature of the heating plate of the pressing bed is adjusted to 171±3„ƒ, when the test piece is placed in the heating plate, давление составляет 14 ± 2kg/cm2 or more, подогревать и нажать 5 минут, the glue is cut off and combined Weigh W2 (g);
(4) Calculation: Resin flow rate (%)=(W1-W2)/W1. 1003.

3. Measurement of плата цепи gel time:
(1) Test piece production: According to the fiber direction of the плата цепи electroplating prepreg, cut into 50×50 (mm) pieces (each piece about 15 grams) at an angle of 45°;
(2) Heating and pressing: adjust the temperature of the heating plate to 171±3°C and the pressure to 35Kg/cm2 for 15 seconds;
(3) Measurement: The test piece is the result of the measurement from the time the pressure starts to the curing time.
4. Determination of the volatile content of the плата цепи:
(1) Test piece production: According to the direction of ////// плата цепи electroplating prepreg fiber, cut into 100×100 (mm) 1 piece at a 45° angle;
(2) Weighing: Weigh W1 (grams) using a balance with an accuracy of 0.001 grams;
(3) Heating: Use an air circulating constant temperature bath, нагревание в течение 15 минут при температуре 163 ± 3°C, and then weigh W2 (grams) with a balance;
(4) Calculation: Volatile content (%)=(W1-W2)/W1×100.