Patent ID: 7800279
Filing Date: 2010-09-21
Classification: B41J,F04B

Abstract:
1. A thermo-buckled micro actuation unit, comprising: a lower film formed on a substrate and made of parylene having a high thermal expansion coefficient, said lower film having a first thickness, the lower film extending over the substrate to enclose a micro actuation unit cavity therebeneath, the micro actuation unit cavity having a cavity entrance and a cavity exit configured to maintain a fluid flow through the micro actuation unit cavity in a direction laterally between the lower film and substrate; an upper film made of parylene having the high thermal expansion coefficient, said upper film being arranged on the lower film and having a second thickness, the second thickness being different from the first thickness; and an electrical resistor layer of a predetermined configuration formed between the lower film and the upper film, said electrical resistor layer being located above and in correspondence with the micro actuation unit cavity; wherein, when an electrical power is supplied to the electrical resistor layer, the electrical resistor layer generates heat, said generated heat inducing a temperature difference between the upper film and the lower film, thereby resulting in thermo-buckled deformation of the upper film and the lower film to actuate the fluid flow in the direction laterally between the lower film and substrate.