| abstract |
A method of attaching MST devices to a support member via an adhesive film, the MST devices each having an attachment face with a first aperture and the support member having a mounting surface with second apertures corresponding to each of the first apertures respectively and a fiducial marker for each of the MST devices respectively, and the adhesive film having a plurality of openings, the method comprising the steps of: positioning the adhesive film using the fiducial marker and the corresponding opening such that the openings register with at least part of the second apertures in the mounting surface; applying the adhesive film to the mounting surface; positioning each of the MST devices relative to the respective openings; and, attaching the MST devices with heat and pressure such that the openings establish the respective first and second apertures. Instead of putting fiducial markers on both the film and the support member for alignment, the vision system use the fluid openings themselves. This is far more direct and precise as the fiducial markers on the film—usually very small holes—are prone to gross distortion and closing over when the film is heated prior to attachment. The openings are much larger features that suffer less distortion relative to their overall shape. Because the openings are large features, the vision system may need to determine a point on or within the opening, such as the centre, using any convenient technique for calculating this point for shapes that will have a degree of variance due to deformation. |