Back to results
US 12,546,009 B2Granted
Method for producing a diaphragm for an ultrasonic sensor, and diaphragm for an ultrasonic transducer
AssigneeRobert Bosch GmbH
InventorsEva-Maria Neugebauer, Tobias Liebelt, Stefanie Boetticher, Markus Junker
Life of this patent
Estimating the term…
Abstract
A method for producing a diaphragm for an ultrasonic sensor. In the method, a diaphragm body made of metal material is first provided. Next, an external surface region of the diaphragm body is degreased. The external surface region of the diaphragm body is then pickled. To pre-activate the subsequently applied second passivation layer, a first passivation layer is also deposited on the external surface region as a first layer.
Claims13
A method for producing at least one vehicle component, the method comprising the following steps:
- providing the vehicle component including an external surface made of metal material;
- degreasing the external surface region of the vehicle component;
- pickling the external surface region of the vehicle component;
- applying a second passivation layer to the external surface region of the vehicle component as a second layer;
- wherein, to pre-activate the subsequently applied second passivation layer, a first passivation layer is deposited on the external surface region as a first layer, using hexafluorotitanic acid,
- wherein the first and second passivation layers together form a composite passivation layer having a surface energy with both disperse and polar components, the disperse component being greater than the polar component.
3 more elements
Dependencies are inferred from the claim text.