This　paper　presents　a　method　for　generating　entanglement　molecules,　which　is　introduced　by　Dur　(2001　Phys.　Rev.　A).　In　this　scheme,　N　ladder-type　three-level　atoms　are　sent　through　a　resonant　weak　coherent　cavity　field,　then　the　system　states　are　measured.　And　the　system　field　may　collapse　onto　some　possible　types　of　entanglement　molecules.　Meanwhile　it　discusses　about　the　interaction　time　from　the　experimental　point　of　view,　and　compare　the　result　with　the　previous　scheme　proposed　by　Huang　(2004　J.　Phys.　B:　At.　Mol.　Opt.　Phys.).　©　2009　Chin.　Phys.　Soc.　and　IOP　Publishing　Ltd.