US Patent 7495328 - Micromechanical component with flow guide cap

http://www.freepatentsonline.com/7495328.html

For some micromechanical flow sensors turbulance can cause unpredictable measurements. This patent from Robert Bosch GmbH teaches a solution to this problem by forming a cap with a grooved surface to smooth the flow. Claim 1 reads:

1. A micromechanical component comprising:

a structure such that a material flow is guided from at least one preferred direction to uniformly envelop the micromechanical component; and

a cap affixed to the micromechanical component, wherein the cap has at least one structured surface having grooves running in a direction of the material flow to guide the material flow.