Yisrael, there is no simple answer to your question. I will however, offer a few comments. When considering the best application method, you need to address the following: 1. Do you have long runs with one panel size or do you have a number of different panel sizes with varying quantities? 2. Do you process very thin laminates? 3. What panel throughput per hour, per shift etc., do you require? 4. Do you need to plug via holes? Generally speaking, curtain coating is good for high throughput, automation, and varying panel sizes. It is not good for thin laminates and plugging via holes. In addition, because it is a single sided process, some compromises in drying are made. One side is dried twice and one side is dried once. This can lead to different appearance and resolution from side to side. High volume low pressure spray (HVLP) is also good for high throughput and varying sizes. Most equipment can handle thin laminates as well. The two drawbacks are: limited solder mask selection and cannot plug via holes. HVLP systems are generally double sided and eliminate the problems associated with a single sided curtain system. Double sided screen coating systems do not produce as high a throughput because they are more operator dependent. Having said that, I have seen systems produce volumes approaching curtain coating and HVLP systems, that are run by a skilled operator. There are also automatic systems now available. The problem is different panel sizes require set up time. If you have one or two standard panel sizes, this is not an issue. Double sided screen systems will yield more coverage per kilo. The process does not need to deposit as much volume of mask to achieve minimum coverage requirements. This translates directly into lower coating cost per panel. Some equipment can also handle thin laminates. And finally, you can plug via holes with a double sided screen coating system. As you can see, there is much to consider before selecting a system that meets your needs. This is just a short version of the differences between applications. I hope this information is helpful. Regards, Bob Metcalf Director Solder Mask Systems Morton Electronic Materials >>> Yisrael Leshman <[log in to unmask]> 09/05/96 03:52pm >>> to all SOLDER MASK TechNeters: if you had to selecet application methode for LPI coating-: curtian coating double sided printing air-spray systems what would you select. your arguments would be appreciated. thanking you in advance yisrael leshman *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************