Electronics, HAF, FPC, Transfer Tape

Product information

tesa® 8873

High performance thermosetting tape for partial reinforcement of Flexible Printed Circuits (FPC)

Product description

tesa® 8873 is a heat curing adhesive tape suitable for partially reinforcing FPC. This transparent double-sided tape has no backing. It is protected by a transparent PET cover liner and a white PET base liner.

tesa® 8873 is free of halogen and compliant with current ROHS standards.

tesa® 8873 is especially suitable for Quick Press processes which are followed by an additional oven curing step. For easy positioning tesa® 8873 offers slight tack. Excellent wetting behaviour minimizes the risk of bubble formation.

Key features of tesa® 8873:

  • Outstanding bonding performance on polyimide and FR-4
  • Excellent wetting behavior to avoid bubble formation between substrates
  • Excellent high temperature resistance in soldering or reflow processes
  • Excellent humidity resistance
  • Low oozing ratio (resin flow)
  • Excellent electrical insulating performance
  • Low outgassing to avoid damage to other components

Main applications

tesa® 8873 is especially recommended for stiffening of FPC where partial reinforcement is necessary.

Technical properties

Backing material




Total thickness

35 µm

Type of adhesive

elastomer modified heat curable epoxy

Type of liner

PET film

Type of cover liner

PET film

Bonding strength (L-peel)

20 N/cm

Bonding strength (T-peel)

10 N/cm

Surface resistivity (min.)

10 10^12 Ω

Volume resistivity

2 10^14 Ωm

Shelf life time < 5°C

6 months

Shelf life time < 25°C

2 months

Rating properties

Humidity resistance


Reflow oven resistance


Soldering resistance


tesa® products prove their impressive quality day in, day out in demanding conditions and are regularly subjected to strict controls. All technical information and data above mentioned are provided to the best of our knowledge on the basis of our practical experience. They shall be considered as average values and are not appropriate for a specification. Therefore tesa SE can make no warranties, expressed or implied, including, but not limited to any implied warranty of merchantability or fitness for a particular purpose. The user is responsible for determining whether the tesa® product is fit for a particular purpose and suitable for the user’s method of application. If you are in any doubt, our technical staff will be glad to support you.


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