Flux spraying method, substrate structure formed by the method, and apparatus for performing the method

Abstract

This invention provides a flux spraying method, a substrate structure formed by the method, and an execution device thereof. The method is applicable to workpieces with a preset spraying range, wherein the preset spraying range is a polygonal region with multiple edges and corners. The method includes an outer frame reinforcement step, which involves controlling the spraying head to spray flux along the inner side of each edge, and, when approaching a corner, sequentially controlling the spraying head to pass through a first preset turning point, offset to a position inside the corner, then move to a second preset turning point, and continue moving and spraying along the next edge. This invention can improve the boundary clarity and coverage consistency of flux spraying at corners.

Claims

1. A flux spraying method applicable to a workpiece having a preset spraying range, the preset spraying range being a polygonal region having a plurality of edges, wherein the intersection of any two adjacent edges forms a corner, the method comprising a frame reinforcement step of spraying flux along the outer edge of the workpiece, the frame reinforcement step being performed by controlling a spray head to move along each edge to simultaneously spray flux, the frame reinforcement step comprising: controlling the spray head to move along an edge parallel to the preset spraying range and inside the edge; when the spray head approaches a first preset turning point of the corner, controlling the spray head to deflect towards the edge and the corner, and then continuing to control the spray head to move towards an inner position close to the corner; when the spray head reaches the inner position, controlling the spray head to deflect away from a subsequent edge to a second preset turning point; and after reaching the second preset turning point, continuing to move along a direction parallel to the subsequent edge and inside it to continuously spray flux.

2. The method as described in request item 1, wherein, The first preset turning point, the internal position, and the second preset turning point form an offset path at the corner. The offset path is a V-shaped path, and the included angle formed by it is smaller than the included angle of the corner.

3. The method as described in claim 1 further includes, before or after the outer frame reinforcement step, performing an internal filling step, wherein the internal filling step controls the spray head to spray within the preset spraying range and moves the spray head along a path to complete flux coverage of the internal area.

4. The method as described in request item 3, wherein, The spraying height of the outer frame reinforcement step is lower than the spraying height of the inner filling step.

5. The method of claim 1, wherein the first preset turning point, the internal position, and the second preset turning point form an outwardly protruding offset path, the method comprising controlling the spray head to spray along the offset path to generate an accumulation structure at the corner.

6. As described in claim 5, the offset path includes the following parameters: an outward displacement distance, which refers to the vertical distance by which the spray head offsets from the first preset turning point to the inner position; a turning distance, which refers to the horizontal distance from the first preset turning point to the inner position; a corner spacing, which refers to the distance between the first preset turning points corresponding to any two adjacent corners; and an inward shrinkage distance, which refers to the vertical shrinkage distance of the inner position relative to the boundary of the preset spraying range; wherein, The ratio of the turning distance to the corner spacing is between 1:14 and 1:17, the ratio of the outward shift distance to the inward shift distance is between 1:0.2 and 1:0.5, and the ratio of the turning distance to the inward shift distance is between 1:0.2 and 1:0.

5.

7. The method as described in request item 1, wherein, The starting and ending points of the outer frame reinforcement step are located within an area that is 80% to 99% inward from the boundary of the preset spraying range.

8. The method as described in request item 1, wherein, After completing the movement step after the second preset turning point, the control steps of controlling the spray head to move to the next corner and offset and turn at the corner are repeated to sequentially complete the flux spraying of each edge and corner in the preset spraying range.

9. A substrate structure having a flux structure layer formed thereon, the flux structure layer being formed by a flux spraying method as described in any one of claims 1 to 8.

10. A flux spraying apparatus, comprising: a carrier platform for carrying a workpiece having a preset spraying range; a spray head disposed above the carrier platform and movable relative to the carrier platform; and a control unit electrically connected to the spray head and configured to control the spray head to perform a flux spraying method as described in any one of claims 1 to 8.

Images