To solve the pressure-sensitive mine-chip low-cost epoxy resin casting, I specifically purchased the company in Tianjin Jinqiao Insulation Materials Co., Ltd. tens of kilograms TXH-1156 epoxy potting material, will be my company in 2006 in the first half of approved sub-products remaining extract a few pieces of each sample to 10 the number of films of epoxy potting test results the following table: (left sample has been due to the long putting-damp, encapsulation is not carried out before the drying processing)
|Chip Lot||Potting ago Parameters||Casting process||5 days curing parameters||15 days curing parameters||Notes|
|U 1mA||I L (μA)||U 1mA||I L (μA)||U 1mA||I L (μA)|
120ml gel +30 ml curing agent (volume ratio 4:1, weight ratio 100:10), and mix thoroughly 8min, room temperature curing.
|0604-5||673V||7.5||673V||6.7 6.7||674 674||6.3|
200ml gel +40 ml curing agent (volume ratio 5:1, weight ratio of 100:8), and mix thoroughly 10min, room temperature curing.
The results can be seen from the above: As long as the proportion of appropriate technology is correct, can be used to reduce the user-made epoxy resin casting cost (the other properties of rubber user-authentication). My company filling plastic processes are as follows:
Before the first chip encapsulation under 120 ℃ drying 30 to 60 minutes; rubber, curing agent in accordance with 5:1 volume ratio (100g: 8g = 8ml weight ratio) with a good mix thoroughly, and mix thoroughly how to adjust the amount of time under the gum, but it should be ensure the full mix well; and then proceed to filling glue. Kaifeng, a longer time if the glue should be heated to glue 80 ~ 100 ℃, thermal insulation of about 30min in order to drive out moisture, cooling and curing agent and then allocated in proportion to the use of a good mix thoroughly. Potting after basic curing the product placed in the oven for 85 ~ 100 ℃ heat insulation 30 ~ 60 minutes.
Use of other adhesive is also important to note that the user reduce the ratio of curing agent is generally from the manufacturers recommended ratio of 1 / 2 or so begin to try and curing agent dosage should not exceed manufacturer’s recommended maximum ratio of 2 / 3.