Pyrophosphoric acid bath for use in copper-tin alloy plating

Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C106S001260, C428S646000, C428S647000, C428S648000

Reexamination Certificate

active

07150781

ABSTRACT:
The invention relates to a pyrophosphoric acid bath for use in cyanogen-free copper-tin alloy plating that contains an additive (A) composed an amine derivative, an epihalohydrin and a glycidyl ether compound with ratios of epihalohydrin to glycidyl ether compound being 0.5–2 to 0.1–5 on mol basis, per 1 mol of the amine derivative, has a pH of 3 to 9, and optionally contains an additive (B) composed of an organic sulfonic acid and/or an organic sulfonic acid salt, and to a copper-tin alloy coating obtainable by using the bath. The invention provides a pyrophosphoric acid bath for use in copper-tin alloy plating of the cyanogen-free type utilizable on an industrial scale, particularly, capable of performing uniform treatment to exhibit low defective product generation rates even with the current density being incessantly changing between a high state and a low state, as a barrel plating method, and a copper-tin alloy coating obtainable by using the bath.

REFERENCES:
patent: 3945894 (1976-03-01), Martin et al.
patent: 3975346 (1976-08-01), Bosso et al.
patent: 4289812 (1981-09-01), Martin
patent: 6416571 (2002-07-01), Kaneko et al.
patent: 1 146 148 (2001-10-01), None
patent: 1146148 (2001-10-01), None
patent: 10-102278 (1998-04-01), None
EPO, “Notification of Transmittal of The ISR (PCT/ISA/220) and ISR (PCT/ISA/210),” EPO (Rijswijk), (Mar. 4, 2005).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Pyrophosphoric acid bath for use in copper-tin alloy plating does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pyrophosphoric acid bath for use in copper-tin alloy plating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pyrophosphoric acid bath for use in copper-tin alloy plating will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3665017

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.