Piezoelectric material composite membrane acoustic component with broadband and high sound quality and manufacturing method thereof

A piezoelectric material composite membrane acoustic component with broadband and high sound quality, comprising:

• a vibrating membrane including a membrane fixing portion, a piezoelectric plate fixing portion and at least one spacing portion, at least one of said at least one spacing portion is between said membrane fixing portion and said piezoelectric plate fixing portion, wherein said piezoelectric plate fixing portion is surrounded by said at least one of said at least one spacing portion, and said at least one of said at least one spacing portion is surrounded by said membrane fixing portion;
• a supporting frame having a hollow portion, said supporting frame is vertically penetrated by said hollow portion, said membrane fixing portion of said vibrating membrane is fixed by said supporting frame such that said piezoelectric plate fixing portion and said at least one spacing portion of said vibrating membrane are corresponding to said hollow portion of said supporting frame;
• a piezoelectric plate set, which includes:
• a first piezoelectric plate, which includes:
• a first piezoelectric layer;
• a first top electrode layer formed on a first top surface of said first piezoelectric layer;
• and
• a first bottom electrode layer formed on a first bottom surface of said first piezoelectric layer, said first bottom electrode layer of said first piezoelectric plate is fixed on said piezoelectric plate fixing portion of said vibrating membrane;
• and
• a second piezoelectric plate, which includes:
• a second piezoelectric layer;
• a second top electrode layer formed on a second top surface of said second piezoelectric layer;
• and
• a second bottom electrode layer formed on a second bottom surface of said second piezoelectric layer, said second bottom electrode layer of said second piezoelectric plate is fixed on said first top electrode layer of said first piezoelectric plate such that said second bottom electrode layer of said second piezoelectric plate is electrically connected to said first top electrode layer of said first piezoelectric plate;
• and
• an AC power source, which includes:
• a first electrode and a second electrode, wherein said first electrode of said AC power source is electrically connected to said second top electrode layer of said second piezoelectric plate;
• wherein said first bottom electrode layer of said first piezoelectric plate, said first piezoelectric layer of said first piezoelectric plate, said first top electrode layer of said first piezoelectric plate, said second bottom electrode layer of said second piezoelectric plate, said second piezoelectric layer of said second piezoelectric plate and said second top electrode layer of said second piezoelectric plate are disposed on a top surface of said piezoelectric plate fixing portion of said vibrating membrane in an order from bottom to top, wherein said piezoelectric plate fixing portion of said vibrating membrane has a through hole, said piezoelectric plate fixing portion of said vibrating membrane is penetrated by said through hole, said second electrode of said AC power source is electrically connected to said first bottom electrode layer of said first piezoelectric plate through said through hole, wherein said first top electrode layer of said first piezoelectric plate and said second bottom electrode layer of said second piezoelectric plate are not electrically connected to said first electrode of said AC power source, and said first top electrode layer of said first piezoelectric plate and said second bottom electrode layer of said second piezoelectric plate are not electrically connected to said second electrode of said AC power source.