Hi Emirio!
Surface Tek Specialty Product(now,Morton Chemical)was granted two U.S.patents for a process
involving chemically reducing copper oxide to matallic copper in Feb. and May in 1998.
According to these patents,an aqueous reducing solition contains a cyclic borane compound.
Examples of such cyclic borane compounds,morpholine borane,piperidine borane,piridine borane,
piperazine borane,N,N-diethyl aniline borane,and so on.
However,I don't know the chemical composition of Morton's reducing solution which you use.
So please contact to Morton's people about your problem.
Redards,
Motoyo Wajima
Enterprise Server Division,Hitachi,Ltd.(Japan)
emilio cagmat $B$5$s$O=q$-$^$7$? (B:
>Hi Motoyo-san and Rudy,
>
>Your an expert in this field I believe. We are evaluating a new chemical for our post dip-black
oxide precess, a non-amine and borane reducing agent (Morton Chemical). During the course of our
evaluation, we encountered problem in our chemical analysis, since our lab don't have prepared
solution for the analysis of the new chemical. Analysis procedure requires as to prepare 0.1 N
Potassium iodate (KIO3), From MERCK, it stated to dissolve 3.567 g KIO3 in 1 L water, that is
molecular weight of KIO3 divided by 6. I just wanted to know the reduction half reaction
equation of this iodimetry analysis, we have some problems encountered when compared to
supplier's analysis. I don't have any idea also on what particular chemical, (and its
concentration) are we analyzing.
>
>Emil
>
>
>*********** REPLY SEPARATOR ***********
>
>On 05/07/1999, at 1:31 AM, <Rudy Sedlak> wrote:
>
>>For Everyone's Information:
>>
>>Hitachi owns the world wide patent rights on the use of amine borane
>>compounds on reducing oxides to prevent Pink Ring.
>>
>>And further, there is one other treatment for preventing Pink Ring, (with
>>oxide), and that is MacDermid's.
>>
>>The other way that people use to treat Copper to promote bonding is to use
>>immersion Tin plus a Silane treatment. This process is called Durabond, and
>>I think it is owned by McGean Rohco.
>>
>>In certain circumstances, it is possible to use bare Copper with no
>>treatment, also.
>>
>>Most of the time, the PCB customer defines what they want, and the fabricator
>>must do what they want.
>>
>>In the US today, most of the PCB multilayers are done with oxide, and most of
>>those are treated with an amine borane reducing agent.
>>
>>Rudy Sedlak
>>RD Chemical Company
>>
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***********************************************
Motoyo Wajima
Enterprise Server Division,Hitachi,Ltd.
1 Horiyamashita
Hadano-shi,Kanagawa-ken,259-13 Japan
E-mail:[log in to unmask]
Fax:+81-463-88-2935
***********************************************
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For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
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