摘要:
A method for fabricating a stacked complementary MOSFET device comprising the steps of: depositing a layer of phosphosilicate glass (58) on top of the gate electrode (56) of an N channel FET device (4) formed in the surface of a monocrystalline silicon substrate (50) having source (60) and drain (62) diffusions in said substrate on either side of said gate; depositing a layer of P-type polycrystalline silicon (65) over said phosphosilicate glass layer (58), extending over said source (60) and drain (62) diffusions and physically contacting a portion of the surface of said monocrystalline silicon substrate (50); heating said polycrystalline silicon layer (65) including said portion contacting said substrate (50) to a recrystallization temperature; cooling and recrystallizing said polycrystalline silicon layer (65) into a monocrystalline silicon form having a lattice orientation epitaxially reoriented to the lattice orientation of said monocrystalline semiconductor substrate (50); heating said phosphosilicate glass layer (58) so as to diffuse phosphorous atoms from said phosphosilicate glass layer upwardly into said silicon layer (65), forming an N-type region (78) which is juxtaposed with said gate electrode (56) and is self-aligned to said gate electrode. The structure of the complementary MOSFET device comprises an upper, P channel FET device (6) which is formed in said silicon layer (65), and which shares said gate electrode (56) with said N channel FET device (4).
摘要:
Machine structures each comprising a stack of a plurality of micromachine layers laminated together are presented, along with fabrication methods therefore. Each machine structure includes a movable member(s) defined from microstructure of at least one layer of the plurality of micromachine layers comprising the stack. During fabrication, the micromachine layers are separately formed using VLSI techniques and then subsequently laminated together in a selected arrangement in the stack to define the machine structure.
摘要:
A fabrication method and resultant monolithic electronic module having a separately formed thin-film layer attached to a side surface. The fabrication method includes providing an electronic module (154,156) composed of stacked integrated circuit chips. A thin-film layer is separately formed on a temporary support which is used to attach the thin-film layer to the electronic module. The disclosed techniques may also be used for attaching an interposer (158), which may include active circuity, to an electronic module. Specific details of the fabrication method, resulting multichip packages, and various thin-film structures are set forth.
摘要:
A fabrication method and resultant electronic module (21) that facilitates relief of thermally induced stress within the module. The fabrication method includes providing a plurality of integrated circuit chips (11) having grooves in substantially planar main surfaces (13) thereof. The chips are stacked and bonded to each other using an expandable material and a flowable adhesive to form an electronic module. The bonding is such that movement of individual IC chips within the module, in a direction perpendicular to their planar surfaces, is restricted. Upon thermal expansion of the module, the expandable material and the individual chips expand at different rates. However, the expandable material flows into the grooves, relieving thermally induced stress.
摘要:
A cube package of stacked silicon semiconductor chips. To accommodate cube packaging, a metal transfer layer is added over the passivated chip face (16) to bring all of the surface electrical contacts to a common chip edge. The metal transfer layer (9) is insulated from the chip face and from the adjacent chip in the stack by polymer layers (16) having a low dielectric constant, and a thermal expansion coefficient matching that of the stacked chips. An adhesive polymer layer is added to strengthen the bond between the first polymer layers and the adjacent chip in the stack, by deposition of the adhesive layer and partial cure at the wafer level, and then full cure when the chips are stacked together to form the cube.
摘要:
A three-dimensional memory cell, suitable for electrically erasable programmable read only memories (EEPROMS), which has direct-write cell capability is disclosed. The memory cell is utilized in the fabrication of non-volatile, direct-write EEPROM arrays with high integration density. A typical EEPROM array includes a plurality of elongated shallow trenches (30) formed in a semiconductor substrate. Multiple direct-write EEPROM cells are disposed within each elongated trench such that each EEPROM cell shares a recall gate (RG) and a program gate (PG) with another cell in the same trench. Preferably, a silicon rich dielectric (43) (such as silicon rich oxide or silicon rich nitride) disposed between each floating gate (FG) and its associated programming and recall gates. Both common source diffusion and isolated source diffusion embodiments are disclosed. Further, various fabrication methods for the direct-write EEPROM arrays presented are described.