Lens support and wirebond protector
View Patent ↗A wirebond protector has an elongated shape that corresponds to the elongated array of wirebonds along the edge of a microelectronic device that connect a semiconductor die to electrical conductors on a substrate. In making the microelectronic device with wirebond protection, wirebonds are first formed in the conventional manner The wirebond protector is then attached to the device in an orientation in which it extends along the array of wirebonds to at least partially cover the wirebonds.
1. A method for protecting wirebonds of a microelectronic device, comprising:
wirebonding pads of an opto-electronic semiconductor die to electrical connections of a portion of a substrate on which the die is mounted to form a plurality of elongated wirebond arrays, a first wirebond array of the plurality of elongated wirebond arrays extending along a first edge of the opto-electronic semiconductor die, a second wirebond array of the plurality of elongated arrays of wirebonds extending along a second edge of the opto-electronic semiconductor die;
attaching a first elongated wirebond protector to the microelectronic device along the first wirebond array to at least partially cover the wirebonds of the first wirebond array and not cover the opto-electronic semiconductor die;
attaching a second elongated wirebond protector to the microelectronic device along the second wirebond array to at least partially cover the wirebonds of the second wirebond array and not cover the opto-electronic semiconductor die; and
mounting an optical device on respective receiving surfaces of the first and second elongated wirebond protectors in an orientation with the optical device extending across the substrate from one wirebond protector to another, wherein a first end of the optical device is supported by the first elongated wirebond protector, a second end of the optical device is supported by the second eleongated wirebond protector, and a lower surface of the optical device between the first and second ends of the device is immediately adjacent an upper surface of the opto-electronic semiconductor die where the opto-electronic semiconductor die is not covered by the first and second elongated wirebond protectors, a region between the lower surface of the optical device and the upper surface of the opto-electronic semiconductor die providing an optical signal path between the optical device and the opto-electronic semiconductor die.
2. The method claimed in claim 1 , wherein attaching the first elongated wirebond protector comprises engaging a feature of the first elongated wirebond protector to a mating feature of the substrate, and attaching the second elongated wirebond protector comprises engaging a feature of the second elongated wirebond protector to a mating feature of the substrate.
3. The method claimed in claim 2 , wherein engaging a feature of the first elongated wirebond protector comprises snapping the feature of the first elongated wirebond protector to the mating feature of the substrate, and engaging a feature of the second elongated wirebond protector comprises snapping the feature of the second elongated wirebond protector to the mating feature of the substrate.
4. The method claimed in claim 1 , further comprising providing adhesive in a channel of the wirebond protector.
5. The method claimed in claim 4 , further comprising impinging light upon a light-transmissive outer surface of the wirebond protector to optically cure adhesive in the channel.
6. The method claimed in claim 1 , further comprising visually inspecting the wirebonds through a clear wall of the wirebond protector.