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hydrogen & moisture getters
Propietary Inks Formulation
- Polymer binder and ink solution
- Modified Zeolites
- High capacity precious metal
3 or 4 component inks:
Printing Inks
- Printing using an industrial standard polyester screen or equivalent
- Typically #15/40 (cpc/cpi) mesh
- Hi-Rel Ltd metal lids used as substrates in all tests
- Au and Ni plate (on kovar)
- Getter Film thickness in tests was 150 µm
- But range possible from 50 -300 µm
- Easily cured in air at 120°C for 15 minutes
Hydrogen Capacity
Current industry offering is 45-60 cm3 H2/g of getter
- H2 Absorbed: 126.5cm3 H2/g of getter
- H2 Pumping Speed: <1ppm after 24 hours (hermetic enclosure)
Moisture Capacity
Current industry offering 3.5wt% of getter
Note that the system figures above show 100%
capacity the zeolite is achievable
(i.e. no impact of polymer)
Production of moisture from reaction of H2 with the getter results in
approximately 10-20% usage of the Zeolite meaning that 80-90% of its
remaining capacity is for moisture from other sources.
- H2O Absorbed: 10.5 wt% of the ink
Mechanical Integrity Tests
H2 getter integrity on gold and nickel plated lids
- Shaking: 800osc/min, 24h
- Centrifuge: 4500rpm, 30 min
- Temperature Shock: ½ hour at -40°C then 1 hour at 150°C
- High temperature: 200°C for 24 hours
- No cracking, flaking of getter film
- No dust formation
- Thermally stable
- No loss of getter performance after tests
Aging of Getter Inks
Ink Stability (Shelf life)
Ageing: 50°C for 1 week
+60°C for 1 week
Equivalent to 6 months, r.t.
Note other samples are currently being aged in longer term tests
Expected shelf life: >12 months
- No degradation in ink
- No problem with screen-printing aged ink
Activation of Getter
- 120°C in vacuum oven for 6 hours
- For moisture gettering activation only as H2 getter component already activated!
- Lower temperatures may be possible or faster activation times
depending on vacuum conditions
- Unique polymer lattice does not inhibit activation as experienced with other getter systems
Other Getter Features
- Proprietary formulation allows us to set the relative capacities for H2 and H2O gettering depending on the unique hermetic package requirements
- Getter is matt black in appearance
- Ideal for microwave applications!
- Getter is partly self EMI shielding
- Screen print plot can be optimised and positioned accurately in any thickness
- Additional zeolite components may be added for other trace contaminants
removal
- Low ionics
- <<500ppm of Na+, K+, Cl- etc
- Zero polymer loss from getter post curing phase
H2 Getter Series
- Highest capacity per volume/mass of getter
- Cost effective with ease of application and activation
- Removes both hydrogen and moisture
- Can be tailored to remove different relative amounts of hydrogen and moisture and other components can be added for removal of other species
- Totally stable to military test conditions and does not emit any polymer or ionic compounds
Product Benefits
- Maximised selective absorbent characteristics
- Optimised selection of zeolites tableted to a high density, without loss of porosity, ensures uptake of all contaminants and minimises mass/volume of getter tablet for a given duty or the HR1 metal foil getter
- Available in a variety of sizes and shapes at tight dimensional tolerance to fit the package and encapsulation device
- Getter can be easily and quickly activated during normal/routine package back-out
- Good mechanical properties for ease of handling and installation
- Doesn’t degrade or dust over a minimum 20-year life span
Product Uses
- To absorb moisture, solvents, hydrocarbons and CO2 in hermetically sealed electronic component packages including laser fibre-optic pumps, medical applications and diodes etc
General Description
- The Getters are a range of products containing a proprietary mixture of various zeolites, combined with proprietary cement and pelleted to a tight dimensional tolerance in any required size and shape to fit the package
Physical Properties (Typical)
- Form - Pellets/slabs of various shapes
- Size - Can be supplied in a range of sizes
(e.g. 2mm-10mm diameter/lengths, 0.5mm-4mm thickness)
Typical Applications
- Fibre-Optic 980nm Pump
- Medical
- Military
Shipping & Handling
- Avoid breathing dust.
- Do not take internally.
- Please refer to the relevant material safety data sheet for further information.
- Products are available in a range of specialist containers (e.g. recessed plastic trays or pre-packed glass tubes) depending on size of order and requirements of handling at customer site.
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