ECB?

Ultex's [Energy Concentration Bonding] is that...

Ultex is a R&D laboratory of SoundPower
[Energy Concentration] proved [SPS] theory, and physical diffusion is the [ECB] of  [thechnical idea]

アルテクス製サンプル[銅と銅の接合界面観察]
三菱電機先端技術総合研究所