Sorry we don't do this type of work.

At 02:22 PM 1/5/00 +0100, you wrote:
>I am doing a technology survey which needs comparison data between the two
>etch processes used in PWB fabrication: acidic vs. alkaline. I would very
>much appreciate to receive data on following items -- please indicate type
>of product range, throughput and etch speed, type of etch resist and energy
>cost --
>
>1. chemical cost of etching 1 kg copper by cupric chloride and treatment
>costs of spent etchant
>2. chemical cost of etching 1 kg copper by alkaline etchant and treatment
>costs of spent etchant.
>3. quality difference between alkaline and acidic copper etching in terms of
>defect density / production yields, line width uniformity, undercut, etch
>profiles,
>4. relevant cost for the of waste water treatment plant which are
>attributable to the etch process (only patterning not any microetch or metal
>deposition process) in absolute figures and in percentage of total waste
>water treatment installation costs.
>5. transport cost for spent etchants; conditions of the supplier / recycler
>for the etchant "lease".
>6. total cost of ownership for etching 1 kg copper by cupric chloride
>7. total cost of ownership for etching 1 kg copper by alkaline etchant.
>
>Thanks.
>
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