Patent ID: 6342266
Filing Date: 2002-01-29
Classification: H05K

Abstract:
A method for implementing a process for monitoring the solder paste printing process in the setting and soldering of a circuit board, in which paste printing process solder paste (5) is spread on a circuit board (4) at the solder pads (7) of surface mounted devices or corresponding connecting pins, characterized in that for evaluating the quality of the paste printing process at least one paste test pattern (9; 10; 18) is arranged on the circuit board (4; 13), which test pattern is constituted by a number of test elements (91, 92, 93, 94; 111, 112, 113, 114; 121, 122, 123, 124), the shapes of which correspond to geometrical plane figures on the surface of the circuit board, which test elements have varying degrees of difficulty in view of the printing process, and wherein the spatial relationship between test elements is such that the distance between one test element and another is different and each of said test elements has different width and the distance between consecutive elements is smaller as the widths of each said test element becomes larger.