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  • Lid With Hydrogen & Moisture Getters

Lid With 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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