Efficient fluid filtering device and an ink jet printhead including the same

An ink jet printhead assembly comprising:

• (a) ink supplying manifold;
• (b) a printhead having ink ejecting nozzles and an ink inlet for receiving ink flowing from said ink supplying manifold;
• and
• (c) an efficient filtering device mounted across said ink inlet for blocking and preventing air bubbles and contaminants flowing with ink into said ink inlet towards said printhead, and for efficiently filtering such ink, said efficient filtering device including:
• (i) a generally flat member having a first side and a second side, said generally flat member comprising a thick laser ablated film material;
• (ii) a series of fluid flow holes formed through said flat member from said first side to said second side for filtering ink flowing into said ink inlet;
• and
• (iii) a series of pillar members including pillar members defining a trough portion around each fluid flow hole of said series of fluid flow holes, said pillar members and said trough portions being arranged so as to efficiently prevent bubbles and contaminants in flowing ink from impeding ink flow from said first side through said second side.