A method of making a flat panel display device, the method comprising: providing an unfinished product comprising: a first substrate, a second substrate opposing the first substrate, an array of pixels interposed between the first and second substrates, and a frit comprising a plurality of elongated segments, which forms a closed loop surrounding the array and interposed between the first and second substrates, wherein the plurality of elongated segments comprises a first elongated segment extending generally in a first direction, wherein the first elongated segment comprises a first surface, which contacts the first substrate; applying a first laser beam to the first elongated segment at a first position spaced one quarter from a first side along the width of the first elongated segment while moving the first laser beam relative to the first elongated segment, whereby the first laser beam moves generally along the first direction while irradiating a first strip of the first surface, to melt a first portion of the first elongated segment wherein the first strip of the first surface extends generally in the first direction; and applying a second laser beam to the first elongated segment at a second position spaced three quarters from the first side along the width of the first elongated segment while moving the second laser beam relative to the first elongated segment, whereby the second laser beam moves while irradiating a second strip of the first surface to melt a second portion of the first elongated segment; characterised in that the first portion and the second portion together constitute the entire first elongated segment, such that the first elongated segment is melted using only the first and second laser beams. providing an unfinished product comprising: a first substrate, a second substrate opposing the first substrate, an array of pixels interposed between the first and second substrates, and a frit comprising a plurality of elongated segments, which forms a closed loop surrounding the array and interposed between the first and second substrates, wherein the plurality of elongated segments comprises a first elongated segment extending generally in a first direction, wherein the first elongated segment comprises a first surface, which contacts the first substrate; applying a first laser beam to the first elongated segment at a first position spaced one quarter from a first side along the width of the first elongated segment while moving the first laser beam relative to the first elongated segment, whereby the first laser beam moves generally along the first direction while irradiating a first strip of the first surface, to melt a first portion of the first elongated segment wherein the first strip of the first surface extends generally in the first direction; and applying a second laser beam to the first elongated segment at a second position spaced three quarters from the first side along the width of the first elongated segment while moving the second laser beam relative to the first elongated segment, whereby the second laser beam moves while irradiating a second strip of the first surface to melt a second portion of the first elongated segment; characterised in that the first portion and the second portion together constitute the entire first elongated segment, such that the first elongated segment is melted using only the first and second laser beams. a first substrate, a second substrate opposing the first substrate, an array of pixels interposed between the first and second substrates, and a frit comprising a plurality of elongated segments, which forms a closed loop surrounding the array and interposed between the first and second substrates, wherein the plurality of elongated segments comprises a first elongated segment extending generally in a first direction, wherein the first elongated segment comprises a first surface, which contacts the first substrate; applying a first laser beam to the first elongated segment at a first position spaced one quarter from a first side along the width of the first elongated segment while moving the first laser beam relative to the first elongated segment, whereby the first laser beam moves generally along the first direction while irradiating a first strip of the first surface, to melt a first portion of the first elongated segment wherein the first strip of the first surface extends generally in the first direction; and applying a second laser beam to the first elongated segment at a second position spaced three quarters from the first side along the width of the first elongated segment while moving the second laser beam relative to the first elongated segment, whereby the second laser beam moves while irradiating a second strip of the first surface to melt a second portion of the first elongated segment; characterised in that the first portion and the second portion together constitute the entire first elongated segment, such that the first elongated segment is melted using only the first and second laser beams.