TECHNET Archives

May 1999

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
emilio cagmat <[log in to unmask]>
Reply To:
"TechNet E-Mail Forum." <[log in to unmask]>, emilio cagmat" <[log in to unmask]>
Date:
Wed, 12 May 1999 06:30:14 +0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (172 lines)
hi there,
I was thinking that our safety was jeopardize not knowing the difference of the two actions (just like adding water to an acid, and adding acid to the water). But by all means, I have survived my analytical chemistry in school. Thanks Phil.......

emil
*********** BEGIN FORWARDED MESSAGE ***********

On 05/11/1999, at 11:06 PM, Phil Crepeau <[log in to unmask]> wrote:

>
>hi,
>
>probably from a 'practical' point of view there isn't much, but each
>situation would be different.  to observe the magnitude of the effect, you
>can add water to a 1 liter volumetric flask, up to the etched ring, then add
>the kio3.  chances are very slim that the volume would still be 1 liter.
>
>when you are taking analytical chemistry in school, the difference between
>adding water to make a liter versus adding solute to a liter of water is the
>difference between passing and failing the course.
>
>phil crepeau
>
>-----Original Message-----
>From: emilio cagmat [mailto:[log in to unmask]]
>Sent: Monday, May 10, 1999 5:26 PM
>To: Phil Crepeau
>Subject: RE: [TN] Black oxide process
>
>
>Hi Phil,
>Thanks for the info but It is not a typo error, 214.02 divided by 6 is
>indeed 35.67. That is if you are preparing 1 N solution, since we were
>preparing a 0.1 N solution, then it should be 3.567 g. Anyway, we have added
>water to KIO3 crystals in 1 L vol flask, its just that what I wrote was
>dissolve the KIO3 in 1 L of water (Dissolve-I mean adding water to the
>crystals). Also, out of curiosity and for my information, whats the
>difference between the two, dissolve the kio3 in 1 liter of water and you
>add water to the kio3 until you get 1 liter, in terms of accuracy in our
>analysis and safety?
>
>thanks in advance......
>
>emil
>
>
>*********** REPLY SEPARATOR ***********
>
>On 05/10/1999, at 9:50 AM, Phil Crepeau wrote:
>
>>hi,
>>
>>do you have a typo here?  the molecular weight of potassium iodate is
>>214.02.  that divided by 6 is 35.67 not 3.567.  also, you don't dissolve
>the
>>kio3 in 1 liter of water.  you add water to the kio3 until you get 1 liter.
>>that's a subtle, but important, difference.
>>
>>phil crepeau
>>
>>-----Original Message-----
>>From: emilio cagmat [mailto:[log in to unmask]]
>>Sent: Friday, May 07, 1999 4:30 PM
>>To: [log in to unmask]
>>Subject: Re: [TN] Black oxide process
>>
>>
>>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
>>>
>>>################################################################
>>>TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
>>>################################################################
>>>To subscribe/unsubscribe, send a message to [log in to unmask] with
>following
>>text in the body:
>>>To subscribe:   SUBSCRIBE TechNet <your full name>
>>>To unsubscribe:   SIGNOFF TechNet
>>>################################################################
>>>Please visit IPC's web site (http://www.ipc.org) "On-Line Services"
>section
>>for additional information.
>>>For technical support contact Hugo Scaramuzza at [log in to unmask] or
>>847-509-9700 ext.312
>>>################################################################
>>
>>################################################################
>>TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
>>################################################################
>>To subscribe/unsubscribe, send a message to [log in to unmask] with following
>>text in the body:
>>To subscribe:   SUBSCRIBE TechNet <your full name>
>>To unsubscribe:   SIGNOFF TechNet
>>################################################################
>>Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section
>>for additional information.
>>For technical support contact Hugo Scaramuzza at [log in to unmask] or
>>847-509-9700 ext.312
>>################################################################
>

*********** END FORWARDED MESSAGE ***********

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################


ATOM RSS1 RSS2