Category Archives: Hot Wires

Ramp-to-Peak: The First Thought in a Reflow Profile

Ramp-to-peak (RTP) or ramp-to-spike (RTS) have become the favorite reflow profiles. To achieve a RTP profile, simply maintain a constant heating slope (delta temperature/delta time). A ratio of from 1° to 3°C/sec has been shown to be effective. This preferred ratio is dependent on the conditioning of the flux vehicle to achieve solder paste and heat uniformity between the smallest and largest mass of components populated on the PWB. A typical RTP reflow profile is shown in Figure 1.

Walmart-Vizio Tie-up Poses Supply Chain Questions

Walmart’s just-announced acquisition of Vizio will draw plenty of attention, but not nearly what it deserves. The spotlight is on the synergy between the world’s largest physical retailer and a Top 10 maker of smart TVs. Walmart, which already sells Vizio flatscreens by the boatload, is expected to benefit by expanding its ad-targeting capabilities to connected television, per Axios and other analysts.

But I find it intriguing for other reasons: It is an audacious revamping of the OEM-distributor relationship.