LM2904B-Q1: CTE

Hi Giuliano, 

Giuliano Calsavara said:

I would like to get the CTE values (fo -x -y -z axes) for the LM2904BQPWRQ1 component, please.

Typically, Tg of the op amp molding compound is approx. 130C +/-20C. 

Tg is the glass transition temperature:

When a molding compound's bulk temperature is below its Tg temperature, the material tends to be hard, rigid in glassy state and a material's CTE tends to lower, which the polymer crystalline phase is called Alpha-1. 

When a molding compound's bulk temperature exceeds its Tg temperature, the material's mechanical behavior is more flexible (polymer is relaxed) and rubbery, and a material's CTE tends to be higher, which the polymer crystalline phase is called Alpha-2.

If you have other questions, please let me know. 

Best,

Raymond