Method for the mask-etching of a piercing element
First Claim
1. A method for the mask-etching of a piercing element comprising an elongate shaft, a distally protruding tip, a proximal holding part, and a laterally open collecting channel that collects bodily fluid and extends along the shaft as far as the area of the distally protruding tip, in which method a double-sided etching mask is applied to the two sides of a substrate and, under action of an etching agent, the piercing element is formed as a part made by chemical blanking, wherein a channel side of the double-sided etching mask is provided with a channel etching slit for unilateral etching of the collecting channel, wherein the channel etching slit has a proximal end portion and a distal end portion located opposite the proximal end portion, wherein the proximal and/or distal end portion of the channel etching slit is configured to taper toward the end of the channel etching slit, wherein the double-sided etching mask is provided with a flange-forming area, which adjoins the channel etching slit in the proximal direction, and the flange-forming area is undercut to form a flange edge forming a mouth of the collecting channel.
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Accused Products
Abstract
A method is disclosed for the mask-etching of a piercing element having an elongate shaft, a distally protruding tip, a proximal holding part, and a laterally open collecting channel that collects bodily fluid and extends along the shaft as far as the area of the tip, wherein a side of a double-sided etching mask is applied respectively to the two sides of a substrate and, under the action of an etching agent, the piercing element is formed as a part made by chemical blanking, wherein a channel side of the etching mask is provided with a channel etching slit for unilateral etching of the collecting channel.
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Citations
25 Claims
- 1. A method for the mask-etching of a piercing element comprising an elongate shaft, a distally protruding tip, a proximal holding part, and a laterally open collecting channel that collects bodily fluid and extends along the shaft as far as the area of the distally protruding tip, in which method a double-sided etching mask is applied to the two sides of a substrate and, under action of an etching agent, the piercing element is formed as a part made by chemical blanking, wherein a channel side of the double-sided etching mask is provided with a channel etching slit for unilateral etching of the collecting channel, wherein the channel etching slit has a proximal end portion and a distal end portion located opposite the proximal end portion, wherein the proximal and/or distal end portion of the channel etching slit is configured to taper toward the end of the channel etching slit, wherein the double-sided etching mask is provided with a flange-forming area, which adjoins the channel etching slit in the proximal direction, and the flange-forming area is undercut to form a flange edge forming a mouth of the collecting channel.
- 20. A method for the mask-etching of a piercing element comprising an elongate shaft, a distally protruding tip, a proximal holding part, and a laterally open collecting channel that collects bodily fluid and extends along the shaft as far as the area of the distally protruding tip, in which method a double-sided etching mask is applied to the two sides of a substrate and, under action of an etching agent, the piercing element is formed as a part made by chemical blanking, wherein a channel side of the double-sided etching mask is provided with a channel etching slit for unilateral etching of the collecting channel, wherein the channel etching slit has a proximal end portion and a distal end portion located opposite the proximal end portion, wherein the proximal and/or distal end portion of the channel etching slit is configured to taper toward the end of the channel etching slit, wherein the double-sided etching mask, on its opposite side directed away from the channel etching slit, comprises an auxiliary opening which serves to avoid making of undercut edges in the area of the distally protruding tip.
Specification