FORM 6-K

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                         For the month of December 2006

                            TOWER SEMICONDUCTOR LTD.
                 (Translation of registrant's name into English)

                          RAMAT GAVRIEL INDUSTRIAL PARK
                    P.O. BOX 619, MIGDAL HAEMEK, ISRAEL 23105
                    (Address of principal executive offices)

     Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

                         Form 20-F [X]     Form 40-F [_]

     Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

                               Yes [_]     No [X]




     On December 12, 2006, Tower Semiconductor announced it expands High-Voltage
Technology offering with Synopsys' Hercules PVS, attached hereto is a copy of
the press release.

     This Form 6-K is being incorporated by reference into all effective
registration statements filed by us under the Securities Act of 1933.




                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                                     TOWER SEMICONDUCTOR LTD.

Date: December 12, 2006                              By: /s/ Nati Somekh Gilboa
                                                     --------------------------
                                                     Nati Somekh Gilboa
                                                     Corporate Secretary




TOWER SEMICONDUCTOR EXPANDS HIGH-VOLTAGE TECHNOLOGY OFFERING WITH SYNOPSYS'
HERCULES PVS

      NEW RULE FILES COMPLEMENT TOWER'S RELEASE OF HIGH-VOLTAGE TECHNOLOGY

MOUNTAIN VIEW, CALIF., AND MIGDAL HAEMEK, ISRAEL, DECEMBER 12, 2006 - Synopsys,
Inc., a world leader in semiconductor design software, and Tower Semiconductor
Ltd. (Nasdaq:TSEM, TASE:TSEM), a pure-play independent specialty foundry, today
announced that Synopsys' Hercules(TM) Physical Verification Suite (PVS) rule
files are now available for Tower Semiconductor's release of 180-nanometer (nm)
high-voltage technology. The availability of Hercules rule files for both design
rule checking (DRC) and layout versus schematic (LVS) on this specialized
process is the result of close cooperation between the two companies. Hercules
rule files are also supported in Tower's standard logic technology processes.

"Tower's continued support of Hercules PVS for sign-off verification enables our
customers to continue working in the Synopsys design environment for our
specialized technology offering," said Yaakov Milstain, vice president and
general manager for design services at Tower. "This joint endeavor is evidence
of our strong relationship with Synopsys, one of the leading EDA providers."

The Hercules DRC rule file development, including support for specialized 180nm
high-voltage devices, has been qualified for sign-off using a rigorous set of
specialized test cases. Hercules LVS can also be used with Synopsys'
Star-RCXT(TM) extraction solution to merge highly accurate parasitic data with
the schematic-level devices. This unique capability delivers greater simulation
accuracy while allowing circuit designers to design and analyze circuits at a
familiar level of detail.

"The availability of Hercules PVS rule files for Tower's high-voltage technology
demonstrates the broadening foundry support for Hercules PVS on specialized
processes," said Anantha Sethuraman, vice president of marketing, Design for
Manufacturing, at Synopsys. "Qualification by foundries such as Tower
Semiconductor enables our mutual customers to benefit from higher DRC
performance and a proven transistor flow."

ABOUT SYNOPSYS DFM

With its design for manufacturing (DFM) tools, Synopsys is expanding on what is
already the industry's most comprehensive DFM solution that spans from RTL to
silicon. Synopsys' DFM product family addresses critical manufacturability and
yield issues with the following products: IC Compiler physical design solution,
PrimeYield LCC, PrimeYield CMP and PrimeYield CAA, Hercules(TM) PVS, Proteus
OPC, CATS(R) mask data preparation product, SiVL(R) lithography verification
tool, patented PSM technology, and physics-based TCAD suite of simulation
products. Synopsys' Manufacturing Yield Management (MYM) solutions extend
directly into the fab, providing customers real time access to yield data and
the analysis capability needed to reduce random, systematic and parametric
defects.




ABOUT SYNOPSYS

Synopsys, Inc. is a world leader in electronic design automation (EDA) software
for semiconductor design. The company delivers technology-leading semiconductor
design and verification platforms and IC manufacturing software products to the
global electronics market, enabling the development and production of complex
systems-on-chip (SoCs). Synopsys also provides intellectual property and design
services to simplify the design process and accelerate time-to-market for its
customers. Synopsys has its headquarters in Mountain View, Calif., and has
offices in more than 60 locations throughout North America, Europe, and Asia.
Visit Synopsys online at http://www.synopsys.com.

ABOUT TOWER SEMICONDUCTOR

Tower Semiconductor Ltd. is a pure-play independent specialty wafer foundry
established in 1993. The company manufactures integrated circuits with
geometries ranging from 1.0 to 0.13-micron; it also provides complementary
technical services and design support. In addition to digital CMOS process
technology, Tower offers advanced non-volatile memory solutions, mixed-signal &
RF-CMOS, and CMOS image-sensor technologies. To provide world-class customer
service, the company maintains two manufacturing facilities: Fab 1 has process
technologies from 1.0 to 0.35 micron and can produce up to 16,000 150mm wafers
per month. Fab 2 features 0.18 and 0.13-micron, standard and specialized process
technologies, and has the current capacity of up to 15,000 200mm wafers per
month. Tower's Web site is located at http://www.towersemi.com.

SAFE HARBOR

This press release includes forward-looking statements, which are subject to
risks and uncertainties. Actual results may vary from those projected or implied
by such forward-looking statements. A complete discussion of risks and
uncertainties that may affect the accuracy of forward-looking statements
included in this press release or which may otherwise affect our business is
included under the heading "Risk Factors" in our most recent Annual Report on
Form 20-F, Forms F-1, F-3 and 6-K, as were filed with the Securities and
Exchange Commission and the Israel Securities Authority. We do not intend to
update, and expressly disclaim any obligation to update, the information
contained in this release.

                                   ----------

Synopsys, CATS, PrimeTime and SiVL are registered trademarks of Synopsys, Inc.
Hercules and Star-RCXT are trademarks of Synopsys, Inc. Any other trademarks or
registered trademarks mentioned in this release are the intellectual property of
their respective owners.




CONTACTS:

Sheryl Gulizia
Synopsys, Inc.
650-584-8635
sgulizia@synopsys.com

Michael Axelrod
Tower Semiconductor USA:
408-330-6871
pr@towersemi.com