Sensor Encapsulation
DELO’s high-performance adhesives, such as MONOPOX and DUOPOX, are engineered to protect bare dies, wire bonds, and entire PCBs from mechanical stress, thermal cycling, and aggressive chemicals.
What do Sensor Encapsulation Adhesives do?
Sensor encapsulation is critical in automotive electronics, where components must withstand extreme environmental conditions. The adhesives used for IC and sensor encapsulation in the automotive industry must withstand extreme chemical stresses and large variations in temperature, from -65°C to +180°C.
Adhesive Key Features
- High-purity adhesives for bare die and component encapsulation
- Low CTE to prevent warpage and breaking of wirebonds
- High Tg to minimise stresses, both during and after cure
- Excellent protection against mechanical stress (temperature, vibration, etc.)
- Very high chemical resistance
GlobTop encapsulation process
When encapsulating bare ICs (a process sometimes known as chip-on-board, or COB), two options are used: A one-stage process called GlobTop for small-area encapsulation, where an adhesive with a tailored viscosity is dispensed onto the surface of the die. The controlled flowing behaviour of the adhesive results in a dome of adhesive that protects the IC and the wire bonds, and the adhesive is then heat-cured to harden the dome.
Dam and Fill encapsulation process
When the encapsulation area is too large to use a GlobTop (because of the dome height), then a wall or Dam is dispensed around the IC using a high viscosity adhesive, and the interior is then Filled with a low viscosity version of the same adhesive. Both adhesives are cured simultaneously.
Entire encapsulation with two-part adhesives
Two-part versions of the same adhesives are used to encapsulate whole PCB’s and the components assembled onto them. These adhesives offer long term protection against chemicals such as diesel, petrol and oils, and also against the temperature extremes seen during shipment and lifetime of the automobiles.
Performance highlights
- Temperature range: -65°C to +180°C
- Humidity resistance: >1,000 hours at +85°C / 85% RH
- Thermal shock resistance: >1,000 cycles from -40°C to +150°C
- JEDEC MSL 1 classification
- RoHS compliant
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Knowledge Base Articles
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Further Information
Applications
Adhesives for Automotive Bonding, Joining and Sealing Applications
Industry Segments
Automotive, Transport, High Reliability
Delo Website
Region
Available from Inseto in the United Kingdom & Ireland
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