含二苯并八元环结构的改性环氧树脂及其制备方法、底部填充胶
A method for preparing modified epoxy resin by introducing a dibenzo-eight-membered ring structure into the main chain structure of epoxy resin reduces the thermal expansion coefficient of the bottom filler by introducing a dibenzo-eight-membered ring structural unit into the main chain structure of epoxy resin. This solves the problems of detachment, peeling, and cracking caused by the difference in thermal expansion coefficient in the prior art, and achieves excellent mechanical properties, insulation properties, and adhesion properties in multiple application environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS
- Filing Date
- 2022-11-29
- Publication Date
- 2026-07-17
AI Technical Summary
The existing underfill adhesive suffers from detachment, peeling, and cracking due to differences in the coefficient of thermal expansion during temperature changes, threatening the lifespan and reliability of the chip. In particular, the existing technology cannot effectively solve the problem of reducing the coefficient of thermal expansion of the underfill adhesive during temperature changes.
The preparation method of modified epoxy resin by introducing a dibenzo-eight-membered ring structure into epoxy resin involves introducing a dibenzo-eight-membered ring structural unit into the main chain structure of the epoxy resin. At room temperature, this structure is in a chair-like stable structure, but under heating, the structure gradually transforms into a boat-like structure, resulting in the shrinkage of free volume and thus the negative expansion phenomenon inside the molecular structure. This effectively counteracts the thermal expansion effect of the epoxy resin composite material, thereby achieving the purpose of reducing the expansion coefficient of the bottom filler.
By introducing a dibenzo-eight-membered ring structural unit into the main chain structure of epoxy resin, the structure undergoes a transformation from a chair structure to a boat structure at room temperature, thus solving a technical problem.
Smart Images
Figure SMS_19