A circuit board with an electrostatic discharge protection mechanism and an electronic apparatus having the same are provided. The circuit board includes a substrate, at least one signal trace, and a conductive element. The at least one signal trace is disposed on the substrate. The conductive element is electrically connected to a ground plane of the substrate and crosses over the at least one signal trace. The conductive element has at least one discharging portion. The position of the at least one discharging portion corresponds to the at least one signal trace. A gap exists between the at least one discharging portion and the at least one signal trace. A static electricity of the at least one signal trace is discharged to the at least one discharging portion.

A method forms an air gap metal tip structure for (ESD) protection. The method forms an air chamber, from an upper substrate and a lower substate disposed below the upper substrate, within which a first metal tip and a second metal tip are disposed. The first and second metal tips are disposed along at least one horizontal axis parallel to the upper and lower substrates. The chamber includes a portion between points of the metal tips, such that oxygen trapped in the chamber is converted into ozone responsive to an arc between the metal tips to dissipate the arc, and the ozone is decomposed back into the oxygen responsive to an arc absence between the metal tips to maintain the ESD protection for subsequent arcs. An under fill level is disposed between the lower and upper substrates, and above one or more layers having the first and second metal tips.

It is common for a power tool system from a manufacturer to include a battery pack that is designed and configured to mate and operate with at least one power tool and a battery charger. However, as systems have evolved it has become desirable to provide a battery pack that is designed and configured to mate and operate with at least one power tool and a first battery charger but not a second battery charger. The present disclosure provides a battery pack including a housing, a terminal block, a plurality of terminals, and a mechanical lockout for allowing engagement with a power tool and a first battery charger while preventing engagement with a second battery charger.

An electrical apparatus has an external conductive housing. A printed circuit board is provided (separate to a main circuit board of the apparatus) within a PCB housing. The printed circuit board is mechanically and electrically connected to the external housing and has an arc gap between a first contact which connects electrically to the external housing and a second contact which connects electrically to a power supply terminal. Thus, a dedicated circuit is used to perform a discharge function so that the housing and main circuit board do not need to be redesigned.

A spacing-assured gas discharge tube assembly is installed on a printed circuit board, which may be part of a motor controller. The discharge tube assembly includes a tube body and an electrostatic spacing shield disposed at least partially around the tube body. The shield is configured to prevent close physical proximity of adjacent structures having electrostatic fields that may alter the breakdown voltage of the tube body.

An air gap metal tip structure is provided for (ESD) protection. The structure includes first and second metal tips disposed along at least one horizontal axis that is parallel to a upper substrate and a lower substrate. The structure includes an air chamber formed between the upper and lower substrate within which the first metal tip and the second metal tip are disposed. The air chamber includes a portion between points of the metal tips. The structure includes an under fill level disposed between the lower and upper substrates, and above one or more layers having the metal tips. Oxygen trapped in the air chamber is converted into ozone responsive to an arc between the metal tips to dissipate the arc, and the ozone is decomposed back into the oxygen responsive to an absence of the arc between the metal tips to maintain the ESD protection for subsequent arcs.

An electronic device comprises: a first plate configured to face one surface of the electronic device; a second plate configured to face in a direction opposite to the first plate; a side bezel structure connected to the first plate and the second plate and configured to surround the side of the electronic device; and a printed circuit board mounted in the electronic device and configured to be connected to the side bezel structure, wherein the printed circuit board comprises: a ground area; a first conductive pad, disposed in one area of the printed circuit board, and configured to couple the side bezel structure and the printed circuit board; and a second conductive pad electrically connected to the ground area and disposed between the first conductive pad and the ground area, wherein the first conductive pad and the second conductive pad may be disposed at an interval through which a current, having a voltage equal to or greater than a threshold voltage between the first conductive pad and a second electrode, may flow.

A spacing-assured gas discharge tube assembly is installed on a printed circuit board, which may be part of a motor controller. The discharge tube assembly includes a tube body and an electrostatic spacing shield disposed at least partially around the tube body. The shield is configured to prevent close physical proximity of adjacent structures having electrostatic fields that may alter the breakdown voltage of the tube body.

To protect memory cards, such as SD type cards, and similar devices from Electrostatic Discharge (ESD), the input pads of the device include points along their edges that are aligned with correspond points on a conductive frame structure mounted adjacent the input pad to form a spark gap. The input pads are connected to a memory controller or other ASIC over signal lines that include a diode located between the input pad and the ASIC and a resistance located between the input pad and the diode. The resistance and diode are selected such that an ESD event at an input pad triggers a discharge across the spark gap before it is transmitted on to the ASIC, while also allowing a high data rate for signals along the signal line.

Devices and systems for controlling electrostatic discharge on electronic at the interface of mating electrical connectors. An electrostatic discharge (ESD) control device comprises a substrate and at least one connector pin hole. An outer edge of the substrate is also electrically conductive and configured to be electrically connected to a ground. Each the connector pin hole(s) is electrically conductive such that it electrically connects to a respective pin of one of the mating electrical connectors. For each of the connector pin hole(s), an electrically conductive trace is disposed in the substrate. Each of the traces has a pair of opposing sharp points in close proximity to each other and directed at each other. One of the sharp points is electrically connected to the electrically conductive connector pin hole, and the other sharp point is electrically connected to the electrically conductive outer edge of the substrate.