A Drop A Drop - - on on - - Demand Demand Printhead Printhead Suitable for Suitable for Hot and Relatively Hot and Relatively Viscous Liquids Viscous Liquids Wolfgang Wehl Wolfgang Wehl • • J J ö ö rg Wild rg Wild • • Bj Bj ö ö rn Lemmermeyer rn Lemmermeyer • • Michael K Michael K ü ü bler bler International Workshop on Ink-jet Printing of Functional Polymers and Materials 29-30 June 2005, Eindhoven, The Netherlands Institut für Mechatronik Heilbronn
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A DropA Drop--onon--DemandDemandPrintheadPrinthead Suitable for Suitable for
Hot and Relatively Hot and Relatively Viscous LiquidsViscous Liquids
Wolfgang WehlWolfgang Wehl •• JJöörg Wild rg Wild •• BjBjöörn Lemmermeyer rn Lemmermeyer •• Michael KMichael Küüblerbler
International Workshop on Ink-jet Printing of Functional Polymers and Materials 29-30 June 2005, Eindhoven, The Netherlands
• Disadvantages: lack of miniaturization potential, stencil required ⇒ prevents use for rapid prototyping
2. Galvanic Deposition
• Advantages: excellent miniaturization
• Disadvantages: prolonged and costly production, mask(s) required ⇒ prevents use for rapid prototyping
The Problem: Bump ProductionThe Problem: Bump Production
Up to now no production method for bumping Up to now no production method for bumping exists which is reasonably priced, reliable and exists which is reasonably priced, reliable and
harmless to the environment! harmless to the environment!