Flex to flex soldering by diode laser
First Claim
Patent Images
1. A method for soldering plastic flex circuits by diode laser, said method comprising the steps of:
- providing at least a first flex circuit and a second flex circuit composed of polymer flex substrate, each having a top and bottom side, and each with at least one contact trace laminated thereon;
providing an area of solder on said at least one contact trace of at least one of said first flex circuit or said second flex circuit;
positioning said first flex circuit and said second flex circuit such that said at least one contact trace of each flex circuit are in substantial alignment;
positioning at least one laser beam to heat said at least one contact trace to melt said solder and fuse said contacts; and
moving said laser beam across said flex circuits.
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Abstract
A method to solder flex circuits by diode laser. First and second flex circuits composed of polymer flex substrate are provided. Each flex circuit has a top and a bottom side and at least one contact trace embedded in its surface. An area of solder is provided on the contact trace of at least one of the flex circuits and the flex circuits are positioned so that the contact traces of each flex circuit are substantially aligned. A laser beam is positioned to heat the contact trace to melt the solder and fuse the contacts.
59 Citations
39 Claims
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1. A method for soldering plastic flex circuits by diode laser, said method comprising the steps of:
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providing at least a first flex circuit and a second flex circuit composed of polymer flex substrate, each having a top and bottom side, and each with at least one contact trace laminated thereon;
providing an area of solder on said at least one contact trace of at least one of said first flex circuit or said second flex circuit;
positioning said first flex circuit and said second flex circuit such that said at least one contact trace of each flex circuit are in substantial alignment;
positioning at least one laser beam to heat said at least one contact trace to melt said solder and fuse said contacts; and
moving said laser beam across said flex circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for soldering plastic flex circuits by using a laser, said method comprising the steps of:
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providing at least a first flex circuit and a second flex circuit composed of polymer flex substrate, each having a top and a bottom side, and each with at least one contact trace laminated thereon;
providing a layer of solder on said at least one contact trace of at least one of said first or said second flex circuits;
positioning said first flex circuit and said second flex circuit such that said at least one contact trace of each flex circuit are in substantial alignment;
positioning at least one laser beam at a point relative to said first flex circuit and said second flex circuit; and
moving said at least one laser beam from said point across said flex circuits over said contact traces to cause said solder to reflow and fuse said contact traces. - View Dependent Claims (16, 17, 18)
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19. A method for soldering plastic flex circuits, said method comprising the steps of:
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providing a first plastic substrate and a second plastic substrate, each with a top side and a bottom side;
laminating at least one first contact trace to said bottom side of said first plastic substrate;
laminating at least one second contact trace to said top side of said second plastic substrate;
aligning said first plastic substrate and said second plastic substrate such that said at least one first contact trace and said at least one second contact trace are substantially aligned and form an alignment area;
applying a layer of solder to said at least one first contact trace within said alignment area;
positioning at least one laser at a point relative to said first plastic substrate and said second plastic substrate; and
moving said at least one laser from said point across said first plastic substrate and said second plastic substrate such that the beam of said laser heats at least a portion of said at least one first contact trace to cause said solder to reflow and fuse said contact traces. - View Dependent Claims (20, 21)
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22. A method for soldering plastic flex circuits by diode laser, said method comprising the steps of:
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providing at least a first flex circuit and a second flex circuit composed of polymer flex substrate, each having a top and bottom side, and each with at least one contact trace laminated thereon;
providing an area of solder on said at least one contact trace of at least one of said first flex circuit or said second flex circuit;
positioning said first flex circuit and said second flex circuit such that said at least one contact trace of each flex circuit are in substantial alignment;
positioning at least one laser beam to heat said at least one contact trace to melt said solder and fuse said contacts; and
moving said laser beam across said flex circuits at a constant speed. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method for soldering plastic flex circuits by using a laser, said method comprising the steps of:
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providing at least a first flex circuit and a second flex circuit composed of polymer flex substrate, each having a top and a bottom side, and each with at least one contact trace laminated thereon;
providing a layer of solder on said at least one contact trace of at least one of said first or said second flex circuits;
positioning said first flex circuit and said second flex circuit such that said at least one contact trace of each flex circuit are in substantial alignment;
positioning at least one laser beam at a point relative to said first flex circuit and said second flex circuit; and
moving said at least one laser beam from said point across said flex circuits over said contact traces at a constant speed to cause said solder to reflow and fuse said contact traces. - View Dependent Claims (37, 38, 39)
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Specification