Systems, devices, and methods for testing integrated circuits in their native environments
Disclosed herein are unitary printed circuit boards (PCBs) and methods of using them for testing an integrated circuit (IC). In some embodiments, a unitary PCB comprises a main board portion and a flexible PCB portion, which are configured to be detached from each other at a separation location on the unitary PCB. The main board portion comprises a plurality of pads, and the flexible PCB portion comprises a plurality of through-holes, where a layout of the through-holes corresponds to a layout of the plurality of pads. In some embodiments, a method of testing an IC of a device comprises separating the unitary PCB into a main board portion and a flexible PCB portion, attaching the IC to the main board portion, soldering the main board portion to a platform PCB of the device, and attaching the flexible PCB portion to the main board portion.
1. A unitary printed circuit board (PCB) for testing an integrated circuit (IC), the unitary PCB comprising:
a main board portion on a first side of a separation line, the main board comprising a first plurality of pads; and
a flexible PCB portion on a second side of the separation line, the flexible PCB portion comprising:
a plurality of through-holes disposed on a first end of the flexible PCB portion; and
a plurality of connectors disposed on a second end of the flexible PCB portion, the plurality of connectors configured to connect the flexible PCB portion to an external test circuit, wherein:
the main board portion and the flexible PCB portion are configured to be detached from each other at the separation line,
a layout of the plurality of through-holes of the flexible PCB portion to matches a layout of the first plurality of pads of the main board portion, wherein the plurality of through-holes are configured to be aligned and soldered to the first plurality of pads.
2. The unitary PCB recited in claim 1 , wherein the main board portion further comprises a plurality of contact points, wherein a layout of the plurality of contact points matches a layout of a plurality of pins of the IC, and the plurality of contact points of the main board portion are configured to be coupled to the plurality of pins of the IC.
3. The unitary PCB recited in claim 2 , wherein the main board portion further comprises a plurality of transfer lines, and wherein at least subset of the plurality of contact points is coupled to the plurality of transfer lines for transferring signals from the IC.
4. The unitary PCB recited in claim 2 , wherein the soldering of the plurality of through-holes to the first plurality of pads is configured to connect the IC to an external test circuit.
5. The unitary PCB recited in claim 1 , wherein a thickness of the main board portion is less than approximately 0.5 mm.
6. The unitary PCB recited in claim 1 , wherein the main board portion further comprises a plurality of contact points, wherein a layout of the plurality of contact points matches a layout of a ball grid array of the IC, and the plurality of contact points are configured to be soldered in one operation in parallel to the ball grid array of the IC.
7. The unitary PCB recited in claim 1 , wherein the main board portion further comprises a second plurality of pads configured to connect the IC to an external test circuit.
8. The unitary PCB recited in claim 1 , wherein the main board portion comprises a universal flash storage (UFS) connector and/or a VSF connector.
9. The unitary PCB recited in claim 1 , wherein a size of the main board portion is approximately 20 mm by approximately 13 mm.
10. A method of using the unitary PCB recited in claim 2 , the method comprising:
separating the main board portion from the flexible PCB portion at the separation line;
soldering at least a portion of the plurality of pins of the IC to at least a portion of the plurality of contact points;
aligning the through-holes of the flexible PCB portion with the first plurality of pads of the main board portion; and
reattaching the flexible PCB portion to the main board portion by soldering at least a portion of the through-holes of the flexible PCB portion to a corresponding at least a portion of the first plurality of pads.
11. A method of using the unitary PCB recited in claim 1 , the method comprising:
separating the main board portion from the flexible PCB portion at the separation line;
soldering the IC to the main board portion;
aligning the through-holes of the flexible PCB portion with the first plurality of pads of the main board portion; and
reattaching the flexible PCB portion to the main board portion by soldering at least a portion of the through-holes of the flexible PCB portion to a corresponding at least a portion of the first plurality of pads.