may take on a variety of shapes however to reduce costs a simple design such as a square loop or a miniature version of the window frame 32 of fig2 may be used applicant has found the best results by the embedded frame overlapping with the periphery of the die as shown in fig5 and 6 for one embodiment the embedded frame 300 may include cross bars 302 joining the sides 304 for additional support as shown in fig8 in the miniature version of the window frame 32 a ledge holds the embedded frame firmly in the mold compound a more complicated shape of frame may also be used for instance a honeycomb pattern but the additional cost of the frame should be low enough such that the overall package remains less expensive than a flail ceramic package in another embodiment a full glass window without a window frame is attached to the mold compound an embedded frame reduces the stresses involved during the mass reflow process for example an embedded frame made of alloy 42 cte u02dc 4 5 ppm c a copper tungsten alloy cte 6 5 u02dc ppm c or a ceramic frame cte u02dc 7 4 ppm c may be employed fig9 a and 9b show one embodiment of a mold that can be used to embed a frame within the mold compound fig9 a shows a cross sectional side view of the mold showing the placement of embedded frame 300 within the mold cavity 340 fig9 b.