BPDA-PDA Polyimide: Synthesis, Characterizations, Aging and Semiconductor Device Passivation

Precursor polymer effect on polyimide/silica hybrid nanocomposite films.

Here we report the influence of the polyimide precursor type on the surface morphology and properties of poly(p-phenylene biphenyltetracarboximide) (BPDA-PDA PI)/silica hybrid composite films. Two types of precursor polymer were employed: poly(p-phenylene biphenyltetracarboxamic acid) (BPDA-PDA PAA) and poly(p-phenylene biphenyltetracarboxamic diethyl ester) (BPDA-PDA PES). These precursor poly...

High-performance electrospun co-polyimide nanofibers

Co-polyimide nanofiber based on BPDA (3, 30 , 4, 40-Biphenyltetracarboxylic dianhydride)/PDA (p-Phenylene-diamine)/ODA (4, 40-Oxydianiline) (BPO) were produced by electrospinning followed by imidization from precursor polyamic acid (PAA) nanofiber. The aligned co-polyimide nanofiber mats possessed a modulus, strength and strain-at-break of respective 10 GPa, 1.04 GPa, and 13.5%. In comparison w...

Wedge and Double Cantilever Beam Tests on a High Temperature Melt Processable Polyimide Adhesive, TPER- BPDA-PA

Polyimide for Silicon Solar Cells with Double-Sided Textured Pyramids

Silicon solar cells incorporating double-sided pyramidal texture are capable of superior light trapping over cells with front-side only texture. However, increased surface area, roughness and exposed <111> crystal planes of textured surfaces not only causes increased recombination, but also makes cells susceptible to shunting through pinholes in the dielectric at the sharp peaks and valleys of ...

Electrical Stability of Low - K Polyimide / Teos Interface Alvin

The effect of lowK polymer passivation on electrical leakage was investigated to evaluate the reliability of polymer integration on device wafers. Polyimide passivation over Al(0.5%Cu) interconnects inlaid in TEOS increases the intralevel leakage current mainly along the polyimide/ TEOS interface. Moisture absorbed in the polyimide, as confirmed by residual gas analysis, further increases the i...