Issue link: https://iconnect007.uberflip.com/i/1323994
48 SMT007 MAGAZINE I JANUARY 2021 Results All 160 data points within 20µm Accuracy Results—Panel This test was done to test the baseline place- ment test/analysis "on panel": • Capability prior to paste and adhesive • <4.5µm repeatability, all placements with 15µm Results • No influence on accuracy due to panel implementation • All samples are placed within +/-25 microns as per assembly requirement Step 6: Automated optical inspection • Check placement accuracy Step 7: X-ray • Examine components for voids Goal: Measure LED placement accuracy base- line. Process • Measure LED placement accuracy on glass plate • Measure LED placement accuracy verification on panel • Dry assembly no wet process • Compare adhesive and solder paste after both pre- and post-reflow Measure LED placement accuracy on glass plate • Place 32 LEDs on each board • Orientations of 0, 90, 180 and 270 • Sample size, 5 boards, 160 data points Accuracy Results—Glass Test Board Purpose: Measure LED placement accuracy verification on panel • Capability prior to paste and adhesive on glass board • 5µm repeatability, all placements within 18µm Figure 4: Glass test plate. Figure 5: Test results.