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ESD protection for medical devices

IP.com Disclosure Number: IPCOM000243915D
Publication Date: 2015-Oct-28
Document File: 3 page(s) / 155K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a novel design for an electrostatic discharge structure to control the effects of electrostaticdischarge ESD for use in particularly medical devices Provided is a small and flexible dischargestructure that fits on a single flexible PCB is suitable for medical applications while protectingsubstantially all of the electronic parts concerned

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Page 01 of 3

ESD protection for medical devices

Abstract

Disclosed is a novel design for an electrostatic discharge structure to control the effects of electrostatic discharge (ESD) for use in particularly medical devices. Provided is a small and flexible discharge structure that fits on a single flexible PCB, is suitable for medical applications, while protecting substantially all of the electronic parts concerned.

Background

- Electrostatic discharge (ESD) may harm components of an electronic circuit. Discharge structures or components are commonly used to control the effect of ESD emission.

Such structures are designed to limit the maximum level for the electrostatic potential (break through voltage).

- Medical devices often need a galvanic separation between body applied parts and parts that are connected to mains. In such a system the discharge structure needs to overcome the galvanic separation.

- In addition for medical devices there may be limitations for the minimum level for the breakthrough voltage (controlling the loss of energy during cardiac defibrillation for several applied parts).

Technical Problem

- Commonly used discharge structures are space consuming and canĀ“t get placed freely - If discharge structures are placed aside to the galvanic separation only a fraction of the electronics is protected (Figure 1)


- Limiting the overall patient safety or the availability of the systems

Patient connection

Electronics floating part

 galvanic separation

Electronics

Non floating part

Entry point for ESD

Discharge structure

Figure 1- system overview discharge structure near the galvanic separation

Mains, protective earth

return path for ESD


Page 02 of 3

Inventor's Solution to the Stated Problem

The invention consists of several steps:

1) Designing a relatively small and flexib...