Apparatus for generating ions in solid ion recording head with improved stability

An apparatus for generating ions, comprising:

• ion generation electrode means having a slit section for generating ions in the slit section;
• induction electrode means for inducing an electric field for generating ions in the slit sections of the ion generation electrode means;
• control electrode means including a pair of electrodes separated by an insulation layer inserted therebetween and having an ion passing hole for controlling a flow of ions generated by the ion generation electrode means and passing through the ion passing hole;
• driving means for applying a signal voltage indicating a timing for passing the flow of ions through the ion passing hole by being in an on state and a timing for not passing the flow of ions through the passing hole by being in an off state to the ion control electrode means;
• and
• bias voltage source means for applying a bias voltage between the ion generation electrode means and the induction electrode means, in order to cause a generation of ions at the slit section of the ion generation electrode means.