Printhead assembly with nested structure

A printhead assembly comprising:

• an elongate ink distribution assembly defining elongate ink ducts from which ink transfer ports extend, the ink distribution assembly further defining a recess in which a laminated stack structure is received in fluid communication with the ink transfer ports;
• and
• the laminated stack structure having layers between which ink channels in fluid communication with the ports are interleaved, the laminated stack defining at least one cavity in which respective ink ejection print head integrated circuits (ICs) can be received in fluid communication with the ink channels,
• wherein the elongate ink distribution assembly includes:
• a distribution molding defining the ink ducts which are substantially parallel;
• a duct cover which forms a lid for the distribution molding;
• and
• a tape automated bond (TAB) film backing pad mounted to the duct cover and against which at least one TAB film extending from respective ICs can extend.