Method and device for testing the quality of printed circuits
OwnerWerner Reisingerinventor
Life of this patent
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Abstract
The invention relates to a method and to a device for testing electronic circuits or the parts thereof on printed circuits. The inventive method comprises the following steps: (a) detecting the radiation that is emitted by the surface of the printed circuit, (b) converting the detected radiation to data that represent a surface structure and/or depth structure of the printed circuit, (c) comparing the data of the surface structure and/or the depth structure with stored data of a desired state of the surface structure and/or depth structure, and (d) determining any deviations between the data of the detected surface structure and/or depth structure and the data of the desired state of the surface structure and/or depth structure.
Claims14
Method for the no-contact testing of electronic circuits or parts thereof on a printed circuit, an infrared radiation being detected which originates from the surface of the printed circuit,
- characterized by
- (a) Detecting the infrared radiation by means of a thermo-optical difference measurement,
- (b) converting the detected infrared radiation to data which represent a depth structure of the printed circuit, in that a depth structure is analyzed from a change of the infrared radiation over the time at a certain point of the printed circuit,
- (c) comparing the data of the depth structure with stored data of a desired condition of the depth structure, and
- (d) determining deviations between the data of the detected depth structure and the data of the desired condition of the depth structure.
Method according to at least one of the preceding claims,
- characterized in that the deviations of Step (b) are stored in a mass memory.
Method according to at least one of the preceding claims,
- characterized in that the data of the desired condition of the depth structure are a layout of the printed circuit designed during the planning.
Dependencies are inferred from the claim text.