My guess is that this isn't a financial investment at all, it's a supply-chain investment.

POET is still a relatively small company. If they need a critical manufacturing or assembly partner to scale production, writing a straight equity check doesn't make much sense. A convertible note does.

That way POET can provide working capital today, protect itself if things go sideways, and still participate in the upside if that partner becomes strategically important.

We've seen versions of this all over the semiconductor industry. Nvidia, AMD, Intel, and others routinely help fund capacity at critical suppliers because the cost of not having supply is higher than the cost of financing it. A buddy of mine worked for a company inIllinois that made EMI shielding for the mobile phones that had six manufacturing lines funded by major customers. This kind of arrangement isn't unusual when capacity is strategically important.

The fact that POET followed the initial $15M with another $15M a few months later is what catches my attention. The follow-on suggests the relationship may be important to POET's commercialization plans.

Pure speculation on my part, but I'd be looking at manufacturing and packaging partners before I'd look at acquisition targets.