TG包装是什么意思

tg（Glass Transition Temperature）：玻璃态转换温度，温度一旦高于tg，物理变化非常明显，如同玻璃加热融化。看下面详细的An important material property often discussed in semiconductor packaging circles is the glass transition temperature, or simply Tg. Below are some key points about Tg:

1) The glass transition temperature (Tg) of a non-crystalline material is the critical temperature at which the material changes its behavior from being 'glassy' to being 'rubbery'. 'Glassy' in this context means hard and brittle (and therefore relatively easy to break), while 'rubbery' means elastic and flexible.

2) Note that the concept of Tg only applies to non-crystalline solids, which are mostly either glasses or rubbers. A glass is defined as a material that has no long-range atomic or molecular order and is below the temperature at which a rearrangement of its atoms or molecules can occur. On the other hand, a rubber is a non-crystalline solid whose atoms or molecules can undergo rea