Look at the design for embedded LEDs in Membrane Switches.

1. SMD LEDs
for
Printed Electronics
Phil Heft
PEMS Specialist
pheft@Hotmail.com

2. SMD LEDs
LED die Cathode mark
Gold plated copper
Product description
Half moon shape
provides more surface
area for adhesion

3. Context:
▪ 1206 package LEDs standard for dot adhesive dispensing of the MSM
industry
▪ Market constant need for a reduced height
▪ Indoor bright in standard colors
Identification:
▪ Standard 1206 LEDs are 0.75 – 1.1mm height
▪ Dedicated 1206 LEDs to MSM are 0.35 – 0.5mm height
Product range:
▪ Single color LEDs: green, yellow, orange, red, blue & white
▪ Bicolor LEDs available
Technology input:
▪ 1206 size package (length & width)
▪ Overall dimension = 3,2 x 1,6 x ht.
Product description

4. Dedicated MS SMD LEDs offer:
▪ Reduced height! = less material expenditure & reduce embossing
▪ Can use standard pick and place techniques
They do come at a premium price level and can be anywhere from 25% to
As much as 3 times the cost of standard SMD LEDs from traditional
manufacturers
Market positioning

5. Design Considerations for placing
1206 SMD LEDS with dot dispensed
conductive epoxy

6. Preferred minimum spacing between LEDs
when using dot dispensed conductive
adhesives on 1206 packages

7. Market positioning
3.2 x 1.6 x 0.75mm (XZxx55W-1)
SMD LEDs Manufacturers and Private Labelers to PEMS
1.6mm x 0.8mm x 0.35mm (LTST-C193)
1.6 mm x 0.8mm x 0.25mm (AGP1608 series)
3.2 mm x 1.6 mm x 1.1 mm (KP series)
3.2 x 1.6 x 0.35mm (ML153 series)
3.2 x 1.6 x 0.35mm (ZQx35W-035 series)
1.6 x 0.8 x 0.36 mm (SML series)
3.2 x 1.6 x 1.1mm (HT 150 series)
1.6 x 0.8 x 0.8 (HT 190 series)
3.2 x 1.6 x 1.1mm (CL-150 series)
1.6 x 0.8 x 0.4mm (CL-197 series)