Hi Technetters,
 
I was under the impression that the Hull Cell employed within the PWB
industry is a three sided, 267ml type. The plated panels reveal the
throwing power and brightness of the plating solution, and, because of its
universality, interpretation of the results can be sketched, and also 
relayed electronically and verbally. Rough plating, Pitted Deposit and
Contamination of the plating bath can be determined upon comparison of
standard panels, with optimization of bath component concentrations,
particularly brighteners and levellers, being the goal. 

Please correct my impressionable mind, if it is wrong.

Thanks,
Lenny Kurup.
On Mon, 7 Jul 1997 [log in to unmask] wrote:

> Hi, 
> A Hull cell is a four-sided vessel, 3 sides are perpendicular to each other,
> the fourth is at an angle. The parallel sides are 4.4 and 12.1 cm long,
> respectively, and are separated by 6.4 cm. The side opposite the 6.4-cm-side
> is at a 40oangle. The 6.4-cm-side is the anode side and a cathode is place at
> the 40o-angle side. You fill the vessel with your plating solution sample and
> apply plating current. Because of the 40o angle, the plating current density
> varies from one side of the cathode to the other, typically from 0.5 to 60
> mA/cm-squared. The quality of the plating solution is indicated by the
> quality of the copper deposit achieved by the varying plating current density
> along the cathode.
> 
> Werner Engelmaier
> Engelmaier Associates, Inc.
> Electronic Packaging, Interconnection and Reliability Consulting
> 23 Gunther Street
> Mendham, NJ  07945  USA
> Phone & Fax: 973-543-2747
> E-mail: [log in to unmask] 
> 
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